Update docs for 1.4.1 release
diff --git a/docs/dyn/compute_v1.instances.html b/docs/dyn/compute_v1.instances.html
index d210ac5..bd060ee 100644
--- a/docs/dyn/compute_v1.instances.html
+++ b/docs/dyn/compute_v1.instances.html
@@ -99,7 +99,7 @@
   <code><a href="#get">get(project, zone, instance)</a></code></p>
 <p class="firstline">Returns the specified instance resource.</p>
 <p class="toc_element">
-  <code><a href="#getSerialPortOutput">getSerialPortOutput(project, zone, instance)</a></code></p>
+  <code><a href="#getSerialPortOutput">getSerialPortOutput(project, zone, instance, port=None)</a></code></p>
 <p class="firstline">Returns the specified instance's serial port output.</p>
 <p class="toc_element">
   <code><a href="#insert">insert(project, zone, body)</a></code></p>
@@ -157,13 +157,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -206,9 +206,9 @@
 
 Args:
   project: string, Project ID for this request. (required)
-  maxResults: integer, Optional. Maximum count of results to be returned. Maximum value is 500 and default value is 500.
-  pageToken: string, Optional. Tag returned by a previous list request truncated by maxResults. Used to continue a previous list request.
-  filter: string, Optional. Filter expression for filtering listed resources.
+  maxResults: integer, Maximum count of results to be returned.
+  pageToken: string, Tag returned by a previous list request when that list was truncated to maxResults. Used to continue a previous list request.
+  filter: string, Filter expression for filtering listed resources.
 
 Returns:
   An object of the form:
@@ -219,7 +219,8 @@
       "a_key": { # Name of the scope containing this set of instances.
         "instances": [ # [Output Only] List of instances contained in this scope.
           { # An Instance resource.
-            "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, STOPPED, TERMINATED.
+            "cpuPlatform": "A String", # [Output Only] The CPU platform used by this instance.
+            "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, and TERMINATED.
             "kind": "compute#instance", # [Output Only] Type of the resource. Always compute#instance for instances.
             "canIpForward": True or False, # Allows this instance to send and receive packets with non-matching destination or source IPs. This is required if you plan to use this instance to forward routes. For more information, see Enabling IP Forwarding.
             "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
@@ -279,6 +280,7 @@
             "statusMessage": "A String", # [Output Only] An optional, human-readable explanation of the status.
             "scheduling": { # Sets the scheduling options for an Instance. # Scheduling options for this instance.
               "automaticRestart": True or False, # Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user).
+              "preemptible": True or False, # Whether the Instance is preemptible.
               "onHostMaintenance": "A String", # Defines the maintenance behavior for this instance. The default behavior is MIGRATE. For more information, see Setting maintenance behavior.
             },
             "machineType": "A String", # Full or partial URL of the machine type resource to use for this instance. This is provided by the client when the instance is created. For example, the following is a valid partial url:
@@ -420,13 +422,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -477,13 +479,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -536,13 +538,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -594,13 +596,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -650,7 +652,8 @@
   An object of the form:
 
     { # An Instance resource.
-    "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, STOPPED, TERMINATED.
+    "cpuPlatform": "A String", # [Output Only] The CPU platform used by this instance.
+    "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, and TERMINATED.
     "kind": "compute#instance", # [Output Only] Type of the resource. Always compute#instance for instances.
     "canIpForward": True or False, # Allows this instance to send and receive packets with non-matching destination or source IPs. This is required if you plan to use this instance to forward routes. For more information, see Enabling IP Forwarding.
     "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
@@ -710,6 +713,7 @@
     "statusMessage": "A String", # [Output Only] An optional, human-readable explanation of the status.
     "scheduling": { # Sets the scheduling options for an Instance. # Scheduling options for this instance.
       "automaticRestart": True or False, # Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user).
+      "preemptible": True or False, # Whether the Instance is preemptible.
       "onHostMaintenance": "A String", # Defines the maintenance behavior for this instance. The default behavior is MIGRATE. For more information, see Setting maintenance behavior.
     },
     "machineType": "A String", # Full or partial URL of the machine type resource to use for this instance. This is provided by the client when the instance is created. For example, the following is a valid partial url:
@@ -762,13 +766,14 @@
 </div>
 
 <div class="method">
-    <code class="details" id="getSerialPortOutput">getSerialPortOutput(project, zone, instance)</code>
+    <code class="details" id="getSerialPortOutput">getSerialPortOutput(project, zone, instance, port=None)</code>
   <pre>Returns the specified instance's serial port output.
 
 Args:
   project: string, Project ID for this request. (required)
   zone: string, The name of the zone for this request. (required)
   instance: string, Name of the instance scoping this request. (required)
+  port: integer, Which COM port to retrieve data from.
 
 Returns:
   An object of the form:
@@ -791,7 +796,8 @@
     The object takes the form of:
 
 { # An Instance resource.
-  "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, STOPPED, TERMINATED.
+  "cpuPlatform": "A String", # [Output Only] The CPU platform used by this instance.
+  "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, and TERMINATED.
   "kind": "compute#instance", # [Output Only] Type of the resource. Always compute#instance for instances.
   "canIpForward": True or False, # Allows this instance to send and receive packets with non-matching destination or source IPs. This is required if you plan to use this instance to forward routes. For more information, see Enabling IP Forwarding.
   "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
@@ -851,6 +857,7 @@
   "statusMessage": "A String", # [Output Only] An optional, human-readable explanation of the status.
   "scheduling": { # Sets the scheduling options for an Instance. # Scheduling options for this instance.
     "automaticRestart": True or False, # Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user).
+    "preemptible": True or False, # Whether the Instance is preemptible.
     "onHostMaintenance": "A String", # Defines the maintenance behavior for this instance. The default behavior is MIGRATE. For more information, see Setting maintenance behavior.
   },
   "machineType": "A String", # Full or partial URL of the machine type resource to use for this instance. This is provided by the client when the instance is created. For example, the following is a valid partial url:
@@ -907,13 +914,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -957,9 +964,9 @@
 Args:
   project: string, Project ID for this request. (required)
   zone: string, The name of the zone for this request. (required)
-  maxResults: integer, Optional. Maximum count of results to be returned. Maximum value is 500 and default value is 500.
-  pageToken: string, Optional. Tag returned by a previous list request truncated by maxResults. Used to continue a previous list request.
-  filter: string, Optional. Filter expression for filtering listed resources.
+  maxResults: integer, Maximum count of results to be returned.
+  pageToken: string, Tag returned by a previous list request when that list was truncated to maxResults. Used to continue a previous list request.
+  filter: string, Filter expression for filtering listed resources.
 
 Returns:
   An object of the form:
@@ -968,7 +975,8 @@
     "nextPageToken": "A String", # [Output Only] A token used to continue a truncated list request.
     "items": [ # [Output Only] A list of Instance resources.
       { # An Instance resource.
-        "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, STOPPED, TERMINATED.
+        "cpuPlatform": "A String", # [Output Only] The CPU platform used by this instance.
+        "status": "A String", # [Output Only] The status of the instance. One of the following values: PROVISIONING, STAGING, RUNNING, STOPPING, and TERMINATED.
         "kind": "compute#instance", # [Output Only] Type of the resource. Always compute#instance for instances.
         "canIpForward": True or False, # Allows this instance to send and receive packets with non-matching destination or source IPs. This is required if you plan to use this instance to forward routes. For more information, see Enabling IP Forwarding.
         "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
@@ -1028,6 +1036,7 @@
         "statusMessage": "A String", # [Output Only] An optional, human-readable explanation of the status.
         "scheduling": { # Sets the scheduling options for an Instance. # Scheduling options for this instance.
           "automaticRestart": True or False, # Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user).
+          "preemptible": True or False, # Whether the Instance is preemptible.
           "onHostMaintenance": "A String", # Defines the maintenance behavior for this instance. The default behavior is MIGRATE. For more information, see Setting maintenance behavior.
         },
         "machineType": "A String", # Full or partial URL of the machine type resource to use for this instance. This is provided by the client when the instance is created. For example, the following is a valid partial url:
@@ -1112,13 +1121,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1171,13 +1180,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1242,13 +1251,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1298,6 +1307,7 @@
 
 { # Sets the scheduling options for an Instance.
   "automaticRestart": True or False, # Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user).
+  "preemptible": True or False, # Whether the Instance is preemptible.
   "onHostMaintenance": "A String", # Defines the maintenance behavior for this instance. The default behavior is MIGRATE. For more information, see Setting maintenance behavior.
 }
 
@@ -1307,13 +1317,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1376,13 +1386,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1433,13 +1443,13 @@
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
@@ -1483,20 +1493,20 @@
 Args:
   project: string, Project ID for this request. (required)
   zone: string, The name of the zone for this request. (required)
-  instance: string, Name of the instance resource to start. (required)
+  instance: string, Name of the instance resource to stop. (required)
 
 Returns:
   An object of the form:
 
     { # An operation resource, used to manage asynchronous API requests.
     "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
-    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project
+    "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all operation resources in the project.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
-    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should be monotonically increasing as the operation progresses.
+    "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess at when the operation will be complete. This number should monotonically increase as the operation progresses.
     "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
     "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.