Regen docs (#364)

diff --git a/docs/dyn/compute_alpha.regionInstanceGroupManagers.html b/docs/dyn/compute_alpha.regionInstanceGroupManagers.html
index a1e9d37..a2c1d28 100644
--- a/docs/dyn/compute_alpha.regionInstanceGroupManagers.html
+++ b/docs/dyn/compute_alpha.regionInstanceGroupManagers.html
@@ -75,19 +75,19 @@
 <h1><a href="compute_alpha.html">Compute Engine API</a> . <a href="compute_alpha.regionInstanceGroupManagers.html">regionInstanceGroupManagers</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#abandonInstances">abandonInstances(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#abandonInstances">abandonInstances(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Schedules a group action to remove the specified instances from the managed instance group. Abandoning an instance does not delete the instance, but it does remove the instance from any target pools that are applied by the managed instance group. This method reduces the targetSize of the managed instance group by the number of instances that you abandon. This operation is marked as DONE when the action is scheduled even if the instances have not yet been removed from the group. You must separately verify the status of the abandoning action with the listmanagedinstances method.</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(project, region, instanceGroupManager)</a></code></p>
+  <code><a href="#delete">delete(project, region, instanceGroupManager, requestId=None)</a></code></p>
 <p class="firstline">Deletes the specified managed instance group and all of the instances in that group.</p>
 <p class="toc_element">
-  <code><a href="#deleteInstances">deleteInstances(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#deleteInstances">deleteInstances(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Schedules a group action to delete the specified instances in the managed instance group. The instances are also removed from any target pools of which they were a member. This method reduces the targetSize of the managed instance group by the number of instances that you delete. This operation is marked as DONE when the action is scheduled even if the instances are still being deleted. You must separately verify the status of the deleting action with the listmanagedinstances method.</p>
 <p class="toc_element">
   <code><a href="#get">get(project, region, instanceGroupManager)</a></code></p>
 <p class="firstline">Returns all of the details about the specified managed instance group.</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(project, region, body)</a></code></p>
+  <code><a href="#insert">insert(project, region, body, requestId=None)</a></code></p>
 <p class="firstline">Creates a managed instance group using the information that you specify in the request. After the group is created, it schedules an action to create instances in the group using the specified instance template. This operation is marked as DONE when the group is created even if the instances in the group have not yet been created. You must separately verify the status of the individual instances with the listmanagedinstances method.</p>
 <p class="toc_element">
   <code><a href="#list">list(project, region, orderBy=None, maxResults=None, pageToken=None, filter=None)</a></code></p>
@@ -96,35 +96,38 @@
   <code><a href="#listManagedInstances">listManagedInstances(project, region, instanceGroupManager, order_by=None, maxResults=None, pageToken=None, filter=None)</a></code></p>
 <p class="firstline">Lists the instances in the managed instance group and instances that are scheduled to be created. The list includes any current actions that the group has scheduled for its instances.</p>
 <p class="toc_element">
+  <code><a href="#listManagedInstances_next">listManagedInstances_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#patch">patch(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Updates a managed instance group using the information that you specify in the request. This operation is marked as DONE when the group is updated even if the instances in the group have not yet been updated. You must separately verify the status of the individual instances with the listmanagedinstances method. This method supports patch semantics.</p>
 <p class="toc_element">
-  <code><a href="#recreateInstances">recreateInstances(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#recreateInstances">recreateInstances(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Schedules a group action to recreate the specified instances in the managed instance group. The instances are deleted and recreated using the current instance template for the managed instance group. This operation is marked as DONE when the action is scheduled even if the instances have not yet been recreated. You must separately verify the status of the recreating action with the listmanagedinstances method.</p>
 <p class="toc_element">
-  <code><a href="#resize">resize(project, region, instanceGroupManager, size)</a></code></p>
+  <code><a href="#resize">resize(project, region, instanceGroupManager, size, requestId=None)</a></code></p>
 <p class="firstline">Changes the intended size for the managed instance group. If you increase the size, the group schedules actions to create new instances using the current instance template. If you decrease the size, the group schedules delete actions on one or more instances. The resize operation is marked DONE when the resize actions are scheduled even if the group has not yet added or deleted any instances. You must separately verify the status of the creating or deleting actions with the listmanagedinstances method.</p>
 <p class="toc_element">
-  <code><a href="#setAutoHealingPolicies">setAutoHealingPolicies(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#setAutoHealingPolicies">setAutoHealingPolicies(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Modifies the autohealing policy for the instances in this managed instance group.</p>
 <p class="toc_element">
-  <code><a href="#setInstanceTemplate">setInstanceTemplate(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#setInstanceTemplate">setInstanceTemplate(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Sets the instance template to use when creating new instances or recreating instances in this group. Existing instances are not affected.</p>
 <p class="toc_element">
-  <code><a href="#setTargetPools">setTargetPools(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#setTargetPools">setTargetPools(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Modifies the target pools to which all new instances in this group are assigned. Existing instances in the group are not affected.</p>
 <p class="toc_element">
   <code><a href="#testIamPermissions">testIamPermissions(project, region, resource, body)</a></code></p>
 <p class="firstline">Returns permissions that a caller has on the specified resource.</p>
 <p class="toc_element">
-  <code><a href="#update">update(project, region, instanceGroupManager, body)</a></code></p>
+  <code><a href="#update">update(project, region, instanceGroupManager, body, requestId=None)</a></code></p>
 <p class="firstline">Updates a managed instance group using the information that you specify in the request. This operation is marked as DONE when the group is updated even if the instances in the group have not yet been updated. You must separately verify the status of the individual instances with the listmanagedinstances method.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="abandonInstances">abandonInstances(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="abandonInstances">abandonInstances(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Schedules a group action to remove the specified instances from the managed instance group. Abandoning an instance does not delete the instance, but it does remove the instance from any target pools that are applied by the managed instance group. This method reduces the targetSize of the managed instance group by the number of instances that you abandon. This operation is marked as DONE when the action is scheduled even if the instances have not yet been removed from the group. You must separately verify the status of the abandoning action with the listmanagedinstances method.
 
 Args:
@@ -140,6 +143,7 @@
     ],
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -147,7 +151,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -192,13 +196,14 @@
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(project, region, instanceGroupManager)</code>
+    <code class="details" id="delete">delete(project, region, instanceGroupManager, requestId=None)</code>
   <pre>Deletes the specified managed instance group and all of the instances in that group.
 
 Args:
   project: string, Project ID for this request. (required)
   region: string, Name of the region scoping this request. (required)
   instanceGroupManager: string, Name of the managed instance group to delete. (required)
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -206,7 +211,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -251,7 +256,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="deleteInstances">deleteInstances(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="deleteInstances">deleteInstances(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Schedules a group action to delete the specified instances in the managed instance group. The instances are also removed from any target pools of which they were a member. This method reduces the targetSize of the managed instance group by the number of instances that you delete. This operation is marked as DONE when the action is scheduled even if the instances are still being deleted. You must separately verify the status of the deleting action with the listmanagedinstances method.
 
 Args:
@@ -267,6 +272,7 @@
     ],
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -274,7 +280,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -352,7 +358,7 @@
           "percent": 42, # percent must belong to [0, 100].
         },
         "minimalAction": "A String", # Minimal action to be taken on an instance. The order of action types is: RESTART < REPLACE.
-        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
+        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
           "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
           "fixed": 42, # fixed must be non-negative.
           "percent": 42, # percent must belong to [0, 100].
@@ -373,7 +379,7 @@
         {
           "healthCheck": "A String", # The URL for the health check that signals autohealing.
           "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-          "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+          "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
             "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
             "fixed": 42, # fixed must be non-negative.
             "percent": 42, # percent must belong to [0, 100].
@@ -390,7 +396,7 @@
         "creating": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be created or are currently being created. If the group fails to create any of these instances, it tries again until it creates the instance successfully.
             #
             # If you have disabled creation retries, this field will not be populated; instead, the creatingWithoutRetries field will be populated.
-        "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified.
+        "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified. More details regarding verification process are covered in the documentation of ManagedInstance.InstanceAction.VERIFYING enum field.
         "restarting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be restarted or are currently being restarted.
         "abandoning": 42, # [Output Only] The total number of instances in the managed instance group that are scheduled to be abandoned. Abandoning an instance removes it from the managed instance group without deleting it.
         "deleting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be deleted or are currently being deleted.
@@ -406,16 +412,31 @@
             "percent": 42, # percent must belong to [0, 100].
           },
           "instanceTemplate": "A String",
-          "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged.
+          "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged. Deprecated in favor of 'name'.
+          "name": "A String", # Name of the version. Unique among all versions in the scope of this managed instance group.
         },
       ],
       "region": "A String", # [Output Only] The URL of the region where the managed instance group resides (for regional resources).
+      "distributionPolicy": { # Policy valid only for regional managed instance groups.
+        "zones": [
+          {
+            "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+          },
+        ],
+      },
       "selfLink": "A String", # [Output Only] The URL for this managed instance group. The server defines this URL.
+      "spreadingPolicy": { # Deprecated in favor of distribution policy. # Policy valid only for regional managed instance groups. Deprecated in favor of distribution_policy.
+        "zones": [
+          {
+            "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+          },
+        ],
+      },
     }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(project, region, body)</code>
+    <code class="details" id="insert">insert(project, region, body, requestId=None)</code>
   <pre>Creates a managed instance group using the information that you specify in the request. After the group is created, it schedules an action to create instances in the group using the specified instance template. This operation is marked as DONE when the group is created even if the instances in the group have not yet been created. You must separately verify the status of the individual instances with the listmanagedinstances method.
 
 Args:
@@ -446,7 +467,7 @@
         "percent": 42, # percent must belong to [0, 100].
       },
       "minimalAction": "A String", # Minimal action to be taken on an instance. The order of action types is: RESTART < REPLACE.
-      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
+      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
         "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
         "fixed": 42, # fixed must be non-negative.
         "percent": 42, # percent must belong to [0, 100].
@@ -467,7 +488,7 @@
       {
         "healthCheck": "A String", # The URL for the health check that signals autohealing.
         "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
           "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
           "fixed": 42, # fixed must be non-negative.
           "percent": 42, # percent must belong to [0, 100].
@@ -484,7 +505,7 @@
       "creating": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be created or are currently being created. If the group fails to create any of these instances, it tries again until it creates the instance successfully.
           #
           # If you have disabled creation retries, this field will not be populated; instead, the creatingWithoutRetries field will be populated.
-      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified.
+      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified. More details regarding verification process are covered in the documentation of ManagedInstance.InstanceAction.VERIFYING enum field.
       "restarting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be restarted or are currently being restarted.
       "abandoning": 42, # [Output Only] The total number of instances in the managed instance group that are scheduled to be abandoned. Abandoning an instance removes it from the managed instance group without deleting it.
       "deleting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be deleted or are currently being deleted.
@@ -500,13 +521,29 @@
           "percent": 42, # percent must belong to [0, 100].
         },
         "instanceTemplate": "A String",
-        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged.
+        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged. Deprecated in favor of 'name'.
+        "name": "A String", # Name of the version. Unique among all versions in the scope of this managed instance group.
       },
     ],
     "region": "A String", # [Output Only] The URL of the region where the managed instance group resides (for regional resources).
+    "distributionPolicy": { # Policy valid only for regional managed instance groups.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
     "selfLink": "A String", # [Output Only] The URL for this managed instance group. The server defines this URL.
+    "spreadingPolicy": { # Deprecated in favor of distribution policy. # Policy valid only for regional managed instance groups. Deprecated in favor of distribution_policy.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -514,7 +551,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -570,7 +607,7 @@
 You can also sort results in descending order based on the creation timestamp using orderBy="creationTimestamp desc". This sorts results based on the creationTimestamp field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first.
 
 Currently, only sorting by name or creationTimestamp desc is supported.
-  maxResults: integer, The maximum number of results per page that should be returned. If the number of available results is larger than maxResults, Compute Engine returns a nextPageToken that can be used to get the next page of results in subsequent list requests.
+  maxResults: integer, The maximum number of results per page that should be returned. If the number of available results is larger than maxResults, Compute Engine returns a nextPageToken that can be used to get the next page of results in subsequent list requests. Acceptable values are 0 to 500, inclusive. (Default: 500)
   pageToken: string, Specifies a page token to use. Set pageToken to the nextPageToken returned by a previous list request to get the next page of results.
   filter: string, Sets a filter expression for filtering listed resources, in the form filter={expression}. Your {expression} must be in the format: field_name comparison_string literal_string.
 
@@ -610,7 +647,7 @@
               "percent": 42, # percent must belong to [0, 100].
             },
             "minimalAction": "A String", # Minimal action to be taken on an instance. The order of action types is: RESTART < REPLACE.
-            "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
+            "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
               "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
               "fixed": 42, # fixed must be non-negative.
               "percent": 42, # percent must belong to [0, 100].
@@ -631,7 +668,7 @@
             {
               "healthCheck": "A String", # The URL for the health check that signals autohealing.
               "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-              "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+              "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
                 "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
                 "fixed": 42, # fixed must be non-negative.
                 "percent": 42, # percent must belong to [0, 100].
@@ -648,7 +685,7 @@
             "creating": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be created or are currently being created. If the group fails to create any of these instances, it tries again until it creates the instance successfully.
                 #
                 # If you have disabled creation retries, this field will not be populated; instead, the creatingWithoutRetries field will be populated.
-            "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified.
+            "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified. More details regarding verification process are covered in the documentation of ManagedInstance.InstanceAction.VERIFYING enum field.
             "restarting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be restarted or are currently being restarted.
             "abandoning": 42, # [Output Only] The total number of instances in the managed instance group that are scheduled to be abandoned. Abandoning an instance removes it from the managed instance group without deleting it.
             "deleting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be deleted or are currently being deleted.
@@ -664,11 +701,26 @@
                 "percent": 42, # percent must belong to [0, 100].
               },
               "instanceTemplate": "A String",
-              "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged.
+              "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged. Deprecated in favor of 'name'.
+              "name": "A String", # Name of the version. Unique among all versions in the scope of this managed instance group.
             },
           ],
           "region": "A String", # [Output Only] The URL of the region where the managed instance group resides (for regional resources).
+          "distributionPolicy": { # Policy valid only for regional managed instance groups.
+            "zones": [
+              {
+                "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+              },
+            ],
+          },
           "selfLink": "A String", # [Output Only] The URL for this managed instance group. The server defines this URL.
+          "spreadingPolicy": { # Deprecated in favor of distribution policy. # Policy valid only for regional managed instance groups. Deprecated in favor of distribution_policy.
+            "zones": [
+              {
+                "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+              },
+            ],
+          },
         },
     ],
     "kind": "compute#regionInstanceGroupManagerList", # [Output Only] The resource type, which is always compute#instanceGroupManagerList for a list of managed instance groups that exist in th regional scope.
@@ -694,9 +746,14 @@
   An object of the form:
 
     {
+    "nextPageToken": "A String", # [Output Only] This token allows you to get the next page of results for list requests. If the number of results is larger than maxResults, use the nextPageToken as a value for the query parameter pageToken in the next list request. Subsequent list requests will have their own nextPageToken to continue paging through the results.
     "managedInstances": [ # List of managed instances.
       {
         "instanceStatus": "A String", # [Output Only] The status of the instance. This field is empty when the instance does not exist.
+        "version": { # [Output Only] Intended version of this instance.
+          "instanceTemplate": "A String", # [Output Only] The intended template of the instance. This field is empty when current_action is one of { DELETING, ABANDONING }.
+          "name": "A String", # [Output Only] Name of the version.
+        },
         "lastAttempt": { # [Output Only] Information about the last attempt to create or delete the instance.
           "errors": { # [Output Only] Encountered errors during the last attempt to create or delete the instance.
             "errors": [ # [Output Only] The array of errors encountered while processing this operation.
@@ -728,6 +785,20 @@
 </div>
 
 <div class="method">
+    <code class="details" id="listManagedInstances_next">listManagedInstances_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
     <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
   <pre>Retrieves the next page of results.
 
@@ -742,7 +813,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="patch">patch(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Updates a managed instance group using the information that you specify in the request. This operation is marked as DONE when the group is updated even if the instances in the group have not yet been updated. You must separately verify the status of the individual instances with the listmanagedinstances method. This method supports patch semantics.
 
 Args:
@@ -774,7 +845,7 @@
         "percent": 42, # percent must belong to [0, 100].
       },
       "minimalAction": "A String", # Minimal action to be taken on an instance. The order of action types is: RESTART < REPLACE.
-      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
+      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
         "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
         "fixed": 42, # fixed must be non-negative.
         "percent": 42, # percent must belong to [0, 100].
@@ -795,7 +866,7 @@
       {
         "healthCheck": "A String", # The URL for the health check that signals autohealing.
         "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
           "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
           "fixed": 42, # fixed must be non-negative.
           "percent": 42, # percent must belong to [0, 100].
@@ -812,7 +883,7 @@
       "creating": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be created or are currently being created. If the group fails to create any of these instances, it tries again until it creates the instance successfully.
           #
           # If you have disabled creation retries, this field will not be populated; instead, the creatingWithoutRetries field will be populated.
-      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified.
+      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified. More details regarding verification process are covered in the documentation of ManagedInstance.InstanceAction.VERIFYING enum field.
       "restarting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be restarted or are currently being restarted.
       "abandoning": 42, # [Output Only] The total number of instances in the managed instance group that are scheduled to be abandoned. Abandoning an instance removes it from the managed instance group without deleting it.
       "deleting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be deleted or are currently being deleted.
@@ -828,13 +899,29 @@
           "percent": 42, # percent must belong to [0, 100].
         },
         "instanceTemplate": "A String",
-        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged.
+        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged. Deprecated in favor of 'name'.
+        "name": "A String", # Name of the version. Unique among all versions in the scope of this managed instance group.
       },
     ],
     "region": "A String", # [Output Only] The URL of the region where the managed instance group resides (for regional resources).
+    "distributionPolicy": { # Policy valid only for regional managed instance groups.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
     "selfLink": "A String", # [Output Only] The URL for this managed instance group. The server defines this URL.
+    "spreadingPolicy": { # Deprecated in favor of distribution policy. # Policy valid only for regional managed instance groups. Deprecated in favor of distribution_policy.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -842,7 +929,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -887,7 +974,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="recreateInstances">recreateInstances(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="recreateInstances">recreateInstances(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Schedules a group action to recreate the specified instances in the managed instance group. The instances are deleted and recreated using the current instance template for the managed instance group. This operation is marked as DONE when the action is scheduled even if the instances have not yet been recreated. You must separately verify the status of the recreating action with the listmanagedinstances method.
 
 Args:
@@ -903,6 +990,7 @@
     ],
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -910,7 +998,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -955,7 +1043,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="resize">resize(project, region, instanceGroupManager, size)</code>
+    <code class="details" id="resize">resize(project, region, instanceGroupManager, size, requestId=None)</code>
   <pre>Changes the intended size for the managed instance group. If you increase the size, the group schedules actions to create new instances using the current instance template. If you decrease the size, the group schedules delete actions on one or more instances. The resize operation is marked DONE when the resize actions are scheduled even if the group has not yet added or deleted any instances. You must separately verify the status of the creating or deleting actions with the listmanagedinstances method.
 
 Args:
@@ -963,6 +1051,7 @@
   region: string, Name of the region scoping this request. (required)
   instanceGroupManager: string, Name of the managed instance group. (required)
   size: integer, Number of instances that should exist in this instance group manager. (required)
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -970,7 +1059,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -1015,7 +1104,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="setAutoHealingPolicies">setAutoHealingPolicies(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="setAutoHealingPolicies">setAutoHealingPolicies(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Modifies the autohealing policy for the instances in this managed instance group.
 
 Args:
@@ -1030,7 +1119,7 @@
       {
         "healthCheck": "A String", # The URL for the health check that signals autohealing.
         "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
           "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
           "fixed": 42, # fixed must be non-negative.
           "percent": 42, # percent must belong to [0, 100].
@@ -1039,6 +1128,7 @@
     ],
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -1046,7 +1136,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -1091,7 +1181,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="setInstanceTemplate">setInstanceTemplate(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="setInstanceTemplate">setInstanceTemplate(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Sets the instance template to use when creating new instances or recreating instances in this group. Existing instances are not affected.
 
 Args:
@@ -1105,6 +1195,7 @@
     "instanceTemplate": "A String", # URL of the InstanceTemplate resource from which all new instances will be created.
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -1112,7 +1203,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -1157,7 +1248,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="setTargetPools">setTargetPools(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="setTargetPools">setTargetPools(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Modifies the target pools to which all new instances in this group are assigned. Existing instances in the group are not affected.
 
 Args:
@@ -1174,6 +1265,7 @@
     "fingerprint": "A String", # Fingerprint of the target pools information, which is a hash of the contents. This field is used for optimistic locking when you update the target pool entries. This field is optional.
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -1181,7 +1273,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
@@ -1254,7 +1346,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(project, region, instanceGroupManager, body)</code>
+    <code class="details" id="update">update(project, region, instanceGroupManager, body, requestId=None)</code>
   <pre>Updates a managed instance group using the information that you specify in the request. This operation is marked as DONE when the group is updated even if the instances in the group have not yet been updated. You must separately verify the status of the individual instances with the listmanagedinstances method.
 
 Args:
@@ -1286,7 +1378,7 @@
         "percent": 42, # percent must belong to [0, 100].
       },
       "minimalAction": "A String", # Minimal action to be taken on an instance. The order of action types is: RESTART < REPLACE.
-      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
+      "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable during the update process. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a fixed value of 1 is used. At least one of { maxSurge, maxUnavailable } must be greater than 0.
         "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
         "fixed": 42, # fixed must be non-negative.
         "percent": 42, # percent must belong to [0, 100].
@@ -1307,7 +1399,7 @@
       {
         "healthCheck": "A String", # The URL for the health check that signals autohealing.
         "initialDelaySec": 42, # The number of seconds that the managed instance group waits before it applies autohealing policies to new instances or recently recreated instances. This initial delay allows instances to initialize and run their startup scripts before the instance group determines that they are UNHEALTHY. This prevents the managed instance group from recreating its instances prematurely. This value must be from range [0, 3600].
-        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when auto-healing. The instance is considered available if all of the following conditions are satisfied: 1. instance's status is RUNNING 2. instance's liveness health check result was observed to be HEALTHY at least once By default, a percent value of 100% is used.
+        "maxUnavailable": { # Encapsulates numeric value that can be either absolute or relative. # Maximum number of instances that can be unavailable when autohealing. The instance is considered available if all of the following conditions are satisfied: 1. Instance's status is RUNNING. 2. Instance's liveness health check result was observed to be HEALTHY at least once. By default, a percent value of 100% is used.
           "calculated": 42, # [Output Only] Absolute value calculated based on mode: mode = fixed -> calculated = fixed = percent -> calculated = ceiling(percent/100 * base_value)
           "fixed": 42, # fixed must be non-negative.
           "percent": 42, # percent must belong to [0, 100].
@@ -1324,7 +1416,7 @@
       "creating": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be created or are currently being created. If the group fails to create any of these instances, it tries again until it creates the instance successfully.
           #
           # If you have disabled creation retries, this field will not be populated; instead, the creatingWithoutRetries field will be populated.
-      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified.
+      "verifying": 42, # [Output Only] The number of instances in the managed instance group that are being verified. More details regarding verification process are covered in the documentation of ManagedInstance.InstanceAction.VERIFYING enum field.
       "restarting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be restarted or are currently being restarted.
       "abandoning": 42, # [Output Only] The total number of instances in the managed instance group that are scheduled to be abandoned. Abandoning an instance removes it from the managed instance group without deleting it.
       "deleting": 42, # [Output Only] The number of instances in the managed instance group that are scheduled to be deleted or are currently being deleted.
@@ -1340,13 +1432,29 @@
           "percent": 42, # percent must belong to [0, 100].
         },
         "instanceTemplate": "A String",
-        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged.
+        "tag": "A String", # Tag describing the version. Used to trigger rollout of a target version even if instance_template remains unchanged. Deprecated in favor of 'name'.
+        "name": "A String", # Name of the version. Unique among all versions in the scope of this managed instance group.
       },
     ],
     "region": "A String", # [Output Only] The URL of the region where the managed instance group resides (for regional resources).
+    "distributionPolicy": { # Policy valid only for regional managed instance groups.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
     "selfLink": "A String", # [Output Only] The URL for this managed instance group. The server defines this URL.
+    "spreadingPolicy": { # Deprecated in favor of distribution policy. # Policy valid only for regional managed instance groups. Deprecated in favor of distribution_policy.
+      "zones": [
+        {
+          "zone": "A String", # URL of the zone where managed instance group is spawning instances (for regional resources). Zone has to belong to the region where managed instance group is located.
+        },
+      ],
+    },
   }
 
+  requestId: string, begin_interface: MixerMutationRequestBuilder Request ID to support idempotency.
 
 Returns:
   An object of the form:
@@ -1354,7 +1462,7 @@
     { # An Operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
     "clientOperationId": "A String", # [Output Only] Reserved for future use.
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
+    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.