Update docs for 1.4.1 release
diff --git a/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html b/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
index 6df9e24..b3abcbe 100644
--- a/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
+++ b/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
@@ -120,9 +120,9 @@
     { # 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",
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format (output only).
+    "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 (output only).
+    "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String",
     "httpErrorMessage": "A String",
     "progress": 42,
@@ -145,20 +145,20 @@
     "user": "A String",
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC 3339 format.
     "kind": "replicapoolupdater#operation", # [Output Only] Type of the resource. Always kind#operation for Operation resources.
-    "name": "A String", # [Output Only] Name of the resource (output only).
-    "region": "A String", # [Output Only] URL of the region where the operation resides (output only).
+    "name": "A String", # [Output Only] Name of the resource.
+    "region": "A String", # [Output Only] URL of the region where the operation resides.
     "error": { # [Output Only] If errors occurred during processing of this operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "endTime": "A String",
     "selfLink": "A String", # [Output Only] Server defined URL for the resource.
-    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating (output only).
+    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
   }</pre>
 </div>
 
@@ -185,35 +185,31 @@
       "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
       "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
       "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-      "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-      "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-        "A String",
-      ],
+      "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
       "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-      "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
+      "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
       "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
-      "error": { # [Output Only] Errors that occurred during rolling update.
+      "error": { # [Output Only] Errors that occurred during the rolling update.
         "errors": [ # [Output Only] The array of errors encountered while processing this operation.
           {
             "message": "A String", # [Output Only] An optional, human-readable error message.
             "code": "A String", # [Output Only] The error type identifier for this error.
-            "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+            "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
           },
         ],
       },
       "policy": { # Parameters of the update process.
-        "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
-        "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
-        "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-        "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
-        "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
-        "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
+        "autoPauseAfterInstances": 42, # Number of instances to update before the updater pauses the rolling update.
+        "instanceStartupTimeoutSec": 42, # The maximum amount of time that the updater waits for a HEALTHY state after all of the update steps are complete. If the HEALTHY state is not received before the deadline, the instance update is considered a failure.
+        "maxNumConcurrentInstances": 42, # The maximum number of instances that can be updated simultaneously. An instance update is considered complete only after the instance is restarted and initialized.
+        "minInstanceUpdateTimeSec": 42, # The minimum amount of time that the updater spends to update each instance. Update time is the time it takes to complete all update actions (e.g. Stop call on Instance resource in Rolling Reboot), reboot, and initialize. If the instance update finishes early, the updater pauses for the remainder of the time before it starts the next instance update.
+        "maxNumFailedInstances": 42, # The maximum number of instance updates that can fail before the group update is considered a failure. An instance update is considered failed if any of its update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if the instance is in an UNHEALTHY state after it finishes all of the update actions.
       },
       "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 update will be complete. This number should be monotonically increasing as the update progresses.
       "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.
       "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-      "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+      "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
     }</pre>
 </div>
 
@@ -238,35 +234,31 @@
     "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
     "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
     "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-    "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-    "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-      "A String",
-    ],
+    "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
     "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-    "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
+    "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
-    "error": { # [Output Only] Errors that occurred during rolling update.
+    "error": { # [Output Only] Errors that occurred during the rolling update.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "policy": { # Parameters of the update process.
-      "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
-      "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
-      "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-      "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
-      "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
-      "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
+      "autoPauseAfterInstances": 42, # Number of instances to update before the updater pauses the rolling update.
+      "instanceStartupTimeoutSec": 42, # The maximum amount of time that the updater waits for a HEALTHY state after all of the update steps are complete. If the HEALTHY state is not received before the deadline, the instance update is considered a failure.
+      "maxNumConcurrentInstances": 42, # The maximum number of instances that can be updated simultaneously. An instance update is considered complete only after the instance is restarted and initialized.
+      "minInstanceUpdateTimeSec": 42, # The minimum amount of time that the updater spends to update each instance. Update time is the time it takes to complete all update actions (e.g. Stop call on Instance resource in Rolling Reboot), reboot, and initialize. If the instance update finishes early, the updater pauses for the remainder of the time before it starts the next instance update.
+      "maxNumFailedInstances": 42, # The maximum number of instance updates that can fail before the group update is considered a failure. An instance update is considered failed if any of its update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if the instance is in an UNHEALTHY state after it finishes all of the update actions.
     },
     "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 update will be complete. This number should be monotonically increasing as the update progresses.
     "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.
     "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-    "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+    "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
   }
 
 
@@ -276,9 +268,9 @@
     { # 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",
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format (output only).
+    "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 (output only).
+    "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String",
     "httpErrorMessage": "A String",
     "progress": 42,
@@ -301,20 +293,20 @@
     "user": "A String",
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC 3339 format.
     "kind": "replicapoolupdater#operation", # [Output Only] Type of the resource. Always kind#operation for Operation resources.
-    "name": "A String", # [Output Only] Name of the resource (output only).
-    "region": "A String", # [Output Only] URL of the region where the operation resides (output only).
+    "name": "A String", # [Output Only] Name of the resource.
+    "region": "A String", # [Output Only] URL of the region where the operation resides.
     "error": { # [Output Only] If errors occurred during processing of this operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "endTime": "A String",
     "selfLink": "A String", # [Output Only] Server defined URL for the resource.
-    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating (output only).
+    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
   }</pre>
 </div>
 
@@ -327,7 +319,7 @@
   zone: string, The name of the zone in which the update's target resides. (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.
-  instanceGroupManager: string, The name of the instance group manager used for filtering.
+  instanceGroupManager: string, The name of the instance group manager. Use this parameter to return only updates to instances that are part of a specific instance group.
   filter: string, Optional. Filter expression for filtering listed resources.
 
 Returns:
@@ -347,35 +339,31 @@
           "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
           "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
           "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-          "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-          "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
-            "A String",
-          ],
+          "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
           "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-          "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
+          "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
           "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
-          "error": { # [Output Only] Errors that occurred during rolling update.
+          "error": { # [Output Only] Errors that occurred during the rolling update.
             "errors": [ # [Output Only] The array of errors encountered while processing this operation.
               {
                 "message": "A String", # [Output Only] An optional, human-readable error message.
                 "code": "A String", # [Output Only] The error type identifier for this error.
-                "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+                "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
               },
             ],
           },
           "policy": { # Parameters of the update process.
-            "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
-            "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
-            "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-            "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
-            "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
-            "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
+            "autoPauseAfterInstances": 42, # Number of instances to update before the updater pauses the rolling update.
+            "instanceStartupTimeoutSec": 42, # The maximum amount of time that the updater waits for a HEALTHY state after all of the update steps are complete. If the HEALTHY state is not received before the deadline, the instance update is considered a failure.
+            "maxNumConcurrentInstances": 42, # The maximum number of instances that can be updated simultaneously. An instance update is considered complete only after the instance is restarted and initialized.
+            "minInstanceUpdateTimeSec": 42, # The minimum amount of time that the updater spends to update each instance. Update time is the time it takes to complete all update actions (e.g. Stop call on Instance resource in Rolling Reboot), reboot, and initialize. If the instance update finishes early, the updater pauses for the remainder of the time before it starts the next instance update.
+            "maxNumFailedInstances": 42, # The maximum number of instance updates that can fail before the group update is considered a failure. An instance update is considered failed if any of its update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if the instance is in an UNHEALTHY state after it finishes all of the update actions.
           },
           "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 update will be complete. This number should be monotonically increasing as the update progresses.
           "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.
           "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-          "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+          "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
         },
     ],
     "kind": "replicapoolupdater#rollingUpdateList", # [Output Only] Type of the resource.
@@ -416,7 +404,7 @@
             {
               "message": "A String", # [Output Only] An optional, human-readable error message.
               "code": "A String", # [Output Only] The error type identifier for this error.
-              "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+              "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
             },
           ],
         },
@@ -470,9 +458,9 @@
     { # 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",
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format (output only).
+    "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 (output only).
+    "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String",
     "httpErrorMessage": "A String",
     "progress": 42,
@@ -495,20 +483,20 @@
     "user": "A String",
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC 3339 format.
     "kind": "replicapoolupdater#operation", # [Output Only] Type of the resource. Always kind#operation for Operation resources.
-    "name": "A String", # [Output Only] Name of the resource (output only).
-    "region": "A String", # [Output Only] URL of the region where the operation resides (output only).
+    "name": "A String", # [Output Only] Name of the resource.
+    "region": "A String", # [Output Only] URL of the region where the operation resides.
     "error": { # [Output Only] If errors occurred during processing of this operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "endTime": "A String",
     "selfLink": "A String", # [Output Only] Server defined URL for the resource.
-    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating (output only).
+    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
   }</pre>
 </div>
 
@@ -527,9 +515,9 @@
     { # 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",
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format (output only).
+    "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 (output only).
+    "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String",
     "httpErrorMessage": "A String",
     "progress": 42,
@@ -552,20 +540,20 @@
     "user": "A String",
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC 3339 format.
     "kind": "replicapoolupdater#operation", # [Output Only] Type of the resource. Always kind#operation for Operation resources.
-    "name": "A String", # [Output Only] Name of the resource (output only).
-    "region": "A String", # [Output Only] URL of the region where the operation resides (output only).
+    "name": "A String", # [Output Only] Name of the resource.
+    "region": "A String", # [Output Only] URL of the region where the operation resides.
     "error": { # [Output Only] If errors occurred during processing of this operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "endTime": "A String",
     "selfLink": "A String", # [Output Only] Server defined URL for the resource.
-    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating (output only).
+    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
   }</pre>
 </div>
 
@@ -584,9 +572,9 @@
     { # 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",
-    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format (output only).
+    "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 (output only).
+    "zone": "A String", # [Output Only] URL of the zone where the operation resides.
     "operationType": "A String",
     "httpErrorMessage": "A String",
     "progress": 42,
@@ -609,20 +597,20 @@
     "user": "A String",
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC 3339 format.
     "kind": "replicapoolupdater#operation", # [Output Only] Type of the resource. Always kind#operation for Operation resources.
-    "name": "A String", # [Output Only] Name of the resource (output only).
-    "region": "A String", # [Output Only] URL of the region where the operation resides (output only).
+    "name": "A String", # [Output Only] Name of the resource.
+    "region": "A String", # [Output Only] URL of the region where the operation resides.
     "error": { # [Output Only] If errors occurred during processing of this operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
     "endTime": "A String",
     "selfLink": "A String", # [Output Only] Server defined URL for the resource.
-    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating (output only).
+    "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
   }</pre>
 </div>