Update docs (#291)

diff --git a/docs/dyn/logging_v2beta1.projects.metrics.html b/docs/dyn/logging_v2beta1.projects.metrics.html
index 02c17b6..6b4ae6c 100644
--- a/docs/dyn/logging_v2beta1.projects.metrics.html
+++ b/docs/dyn/logging_v2beta1.projects.metrics.html
@@ -72,109 +72,190 @@
 
 </style>
 
-<h1><a href="logging_v2beta1.html">Google Cloud Logging API</a> . <a href="logging_v2beta1.projects.html">projects</a> . <a href="logging_v2beta1.projects.metrics.html">metrics</a></h1>
+<h1><a href="logging_v2beta1.html">Stackdriver Logging API</a> . <a href="logging_v2beta1.projects.html">projects</a> . <a href="logging_v2beta1.projects.metrics.html">metrics</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(projectName, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent=None, body, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a logs-based metric.</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(metricName, x__xgafv=None)</a></code></p>
+  <code><a href="#delete">delete(metricName=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Deletes a logs-based metric.</p>
 <p class="toc_element">
-  <code><a href="#get">get(metricName, x__xgafv=None)</a></code></p>
+  <code><a href="#get">get(metricName=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets a logs-based metric.</p>
 <p class="toc_element">
-  <code><a href="#list">list(projectName, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent=None, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
 <p class="firstline">Lists logs-based metrics.</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="#update">update(metricName, body, x__xgafv=None)</a></code></p>
+  <code><a href="#update">update(metricName=None, body, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates or updates a logs-based metric.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(projectName, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent=None, body, x__xgafv=None)</code>
   <pre>Creates a logs-based metric.
 
 Args:
-  projectName: string, The resource name of the project in which to create the metric. Example: `"projects/my-project-id"`. The new metric must be provided in the request. (required)
+  parent: string, The resource name of the project in which to create the metric.
+Example: `"projects/my-project-id"`.
+
+The new metric must be provided in the request. (required)
   body: object, The request body. (required)
     The object takes the form of:
 
-{ # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-    "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-    "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-    "description": "A String", # A description of this metric, which is used in documentation.
+{ # Describes a logs-based metric.  The value of the metric is the
+      # number of log entries that match a logs filter.
+    "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+        # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+    "version": "A String", # Output only. The API version that created or updated this metric.
+        # The version also dictates the syntax of the filter expression. When a value
+        # for this field is missing, the default value of V2 should be assumed.
+    "description": "A String", # Optional. A description of this metric, which is used in documentation.
+    "name": "A String", # Required. The client-assigned metric identifier. Example:
+        # `"severe_errors"`.  Metric identifiers are limited to 100
+        # characters and can include only the following characters: `A-Z`,
+        # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+        # forward-slash character (`/`) denotes a hierarchy of name pieces,
+        # and it cannot be the first character of the name.  The '%' character
+        # is used to URL encode unsafe and reserved characters and must be
+        # followed by two hexadecimal digits according to RFC 1738.
   }
 
   x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
-    { # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-      "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-      "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-      "description": "A String", # A description of this metric, which is used in documentation.
+    { # Describes a logs-based metric.  The value of the metric is the
+        # number of log entries that match a logs filter.
+      "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+          # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+      "version": "A String", # Output only. The API version that created or updated this metric.
+          # The version also dictates the syntax of the filter expression. When a value
+          # for this field is missing, the default value of V2 should be assumed.
+      "description": "A String", # Optional. A description of this metric, which is used in documentation.
+      "name": "A String", # Required. The client-assigned metric identifier. Example:
+          # `"severe_errors"`.  Metric identifiers are limited to 100
+          # characters and can include only the following characters: `A-Z`,
+          # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+          # forward-slash character (`/`) denotes a hierarchy of name pieces,
+          # and it cannot be the first character of the name.  The '%' character
+          # is used to URL encode unsafe and reserved characters and must be
+          # followed by two hexadecimal digits according to RFC 1738.
     }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(metricName, x__xgafv=None)</code>
+    <code class="details" id="delete">delete(metricName=None, x__xgafv=None)</code>
   <pre>Deletes a logs-based metric.
 
 Args:
-  metricName: string, The resource name of the metric to delete. Example: `"projects/my-project-id/metrics/my-metric-id"`. (required)
+  metricName: string, The resource name of the metric to delete.
+Example: `"projects/my-project-id/metrics/my-metric-id"`. (required)
   x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
-    { # A generic empty message that you can re-use to avoid defining duplicated empty messages in your APIs. A typical example is to use it as the request or the response type of an API method. For instance: service Foo { rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty); } The JSON representation for `Empty` is empty JSON object `{}`.
+    { # A generic empty message that you can re-use to avoid defining duplicated
+      # empty messages in your APIs. A typical example is to use it as the request
+      # or the response type of an API method. For instance:
+      #
+      #     service Foo {
+      #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
+      #     }
+      #
+      # The JSON representation for `Empty` is empty JSON object `{}`.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(metricName, x__xgafv=None)</code>
+    <code class="details" id="get">get(metricName=None, x__xgafv=None)</code>
   <pre>Gets a logs-based metric.
 
 Args:
-  metricName: string, The resource name of the desired metric. Example: `"projects/my-project-id/metrics/my-metric-id"`. (required)
+  metricName: string, The resource name of the desired metric.
+Example: `"projects/my-project-id/metrics/my-metric-id"`. (required)
   x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
-    { # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-      "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-      "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-      "description": "A String", # A description of this metric, which is used in documentation.
+    { # Describes a logs-based metric.  The value of the metric is the
+        # number of log entries that match a logs filter.
+      "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+          # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+      "version": "A String", # Output only. The API version that created or updated this metric.
+          # The version also dictates the syntax of the filter expression. When a value
+          # for this field is missing, the default value of V2 should be assumed.
+      "description": "A String", # Optional. A description of this metric, which is used in documentation.
+      "name": "A String", # Required. The client-assigned metric identifier. Example:
+          # `"severe_errors"`.  Metric identifiers are limited to 100
+          # characters and can include only the following characters: `A-Z`,
+          # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+          # forward-slash character (`/`) denotes a hierarchy of name pieces,
+          # and it cannot be the first character of the name.  The '%' character
+          # is used to URL encode unsafe and reserved characters and must be
+          # followed by two hexadecimal digits according to RFC 1738.
     }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(projectName, pageSize=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent=None, pageToken=None, x__xgafv=None, pageSize=None)</code>
   <pre>Lists logs-based metrics.
 
 Args:
-  projectName: string, Required. The resource name of the project containing the metrics. Example: `"projects/my-project-id"`. (required)
-  pageSize: integer, Optional. The maximum number of results to return from this request. You must check for presence of `nextPageToken` to determine if additional results are available, which you can retrieve by passing the `nextPageToken` value as the `pageToken` parameter in the next request.
-  pageToken: string, Optional. If the `pageToken` parameter is supplied, then the next page of results is retrieved. The `pageToken` parameter must be set to the value of the `nextPageToken` from the previous response. The value of `projectName` must be the same as in the previous request.
+  parent: string, Required. The resource name containing the metrics.
+Example: `"projects/my-project-id"`. (required)
+  pageToken: string, Optional. If present, then retrieve the next batch of results from the
+preceding call to this method.  `pageToken` must be the value of
+`nextPageToken` from the previous response.  The values of other method
+parameters should be identical to those in the previous call.
   x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, Optional. The maximum number of results to return from this request.
+Non-positive values are ignored.  The presence of `nextPageToken` in the
+response indicates that more results might be available.
 
 Returns:
   An object of the form:
 
     { # Result returned from ListLogMetrics.
     "metrics": [ # A list of logs-based metrics.
-      { # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-          "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-          "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-          "description": "A String", # A description of this metric, which is used in documentation.
+      { # Describes a logs-based metric.  The value of the metric is the
+            # number of log entries that match a logs filter.
+          "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+              # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+          "version": "A String", # Output only. The API version that created or updated this metric.
+              # The version also dictates the syntax of the filter expression. When a value
+              # for this field is missing, the default value of V2 should be assumed.
+          "description": "A String", # Optional. A description of this metric, which is used in documentation.
+          "name": "A String", # Required. The client-assigned metric identifier. Example:
+              # `"severe_errors"`.  Metric identifiers are limited to 100
+              # characters and can include only the following characters: `A-Z`,
+              # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+              # forward-slash character (`/`) denotes a hierarchy of name pieces,
+              # and it cannot be the first character of the name.  The '%' character
+              # is used to URL encode unsafe and reserved characters and must be
+              # followed by two hexadecimal digits according to RFC 1738.
         },
     ],
-    "nextPageToken": "A String", # If there are more results than were returned, then `nextPageToken` is included in the response. To get the next set of results, call this method again using the value of `nextPageToken` as `pageToken`.
+    "nextPageToken": "A String", # If there might be more results than appear in this response, then
+        # `nextPageToken` is included.  To get the next set of results, call this
+        # method again using the value of `nextPageToken` as `pageToken`.
   }</pre>
 </div>
 
@@ -193,29 +274,61 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(metricName, body, x__xgafv=None)</code>
+    <code class="details" id="update">update(metricName=None, body, x__xgafv=None)</code>
   <pre>Creates or updates a logs-based metric.
 
 Args:
-  metricName: string, The resource name of the metric to update. Example: `"projects/my-project-id/metrics/my-metric-id"`. The updated metric must be provided in the request and have the same identifier that is specified in `metricName`. If the metric does not exist, it is created. (required)
+  metricName: string, The resource name of the metric to update.
+Example: `"projects/my-project-id/metrics/my-metric-id"`.
+
+The updated metric must be provided in the request and have the
+same identifier that is specified in `metricName`.
+If the metric does not exist, it is created. (required)
   body: object, The request body. (required)
     The object takes the form of:
 
-{ # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-    "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-    "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-    "description": "A String", # A description of this metric, which is used in documentation.
+{ # Describes a logs-based metric.  The value of the metric is the
+      # number of log entries that match a logs filter.
+    "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+        # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+    "version": "A String", # Output only. The API version that created or updated this metric.
+        # The version also dictates the syntax of the filter expression. When a value
+        # for this field is missing, the default value of V2 should be assumed.
+    "description": "A String", # Optional. A description of this metric, which is used in documentation.
+    "name": "A String", # Required. The client-assigned metric identifier. Example:
+        # `"severe_errors"`.  Metric identifiers are limited to 100
+        # characters and can include only the following characters: `A-Z`,
+        # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+        # forward-slash character (`/`) denotes a hierarchy of name pieces,
+        # and it cannot be the first character of the name.  The '%' character
+        # is used to URL encode unsafe and reserved characters and must be
+        # followed by two hexadecimal digits according to RFC 1738.
   }
 
   x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
-    { # Describes a logs-based metric. The value of the metric is the number of log entries that match a logs filter.
-      "filter": "A String", # An [advanced logs filter](/logging/docs/view/advanced_filters). Example: `"logName:syslog AND severity>=ERROR"`.
-      "name": "A String", # Required. The client-assigned metric identifier. Example: `"severe_errors"`. Metric identifiers are limited to 1000 characters and can include only the following characters: `A-Z`, `a-z`, `0-9`, and the special characters `_-.,+!*',()%/\`. The forward-slash character (`/`) denotes a hierarchy of name pieces, and it cannot be the first character of the name.
-      "description": "A String", # A description of this metric, which is used in documentation.
+    { # Describes a logs-based metric.  The value of the metric is the
+        # number of log entries that match a logs filter.
+      "filter": "A String", # Required. An [advanced logs filter](/logging/docs/view/advanced_filters).
+          # Example: `"resource.type=gae_app AND severity>=ERROR"`.
+      "version": "A String", # Output only. The API version that created or updated this metric.
+          # The version also dictates the syntax of the filter expression. When a value
+          # for this field is missing, the default value of V2 should be assumed.
+      "description": "A String", # Optional. A description of this metric, which is used in documentation.
+      "name": "A String", # Required. The client-assigned metric identifier. Example:
+          # `"severe_errors"`.  Metric identifiers are limited to 100
+          # characters and can include only the following characters: `A-Z`,
+          # `a-z`, `0-9`, and the special characters `_-.,+!*',()%/`.  The
+          # forward-slash character (`/`) denotes a hierarchy of name pieces,
+          # and it cannot be the first character of the name.  The '%' character
+          # is used to URL encode unsafe and reserved characters and must be
+          # followed by two hexadecimal digits according to RFC 1738.
     }</pre>
 </div>