Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+<h1><a href="cloudsearch_v1.html">Cloud Search API</a> . <a href="cloudsearch_v1.settings.html">settings</a> . <a href="cloudsearch_v1.settings.datasources.html">datasources</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#create">create(body, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates a datasource.</p>
+<p class="toc_element">
+  <code><a href="#delete">delete(name, debugOptions_enableDebugging=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes a datasource.</p>
+<p class="toc_element">
+  <code><a href="#get">get(name, debugOptions_enableDebugging=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets a datasource.</p>
+<p class="toc_element">
+  <code><a href="#list">list(pageSize=None, debugOptions_enableDebugging=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists datasources.</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(name, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Updates a datasource.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="create">create(body, x__xgafv=None)</code>
+  <pre>Creates a datasource.
+
+Args:
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Datasource is a logical namespace for items to be indexed.
+      # All items must belong to a datasource.  This is the prerequisite before
+      # items can be indexed into Cloud Search.
+    "operationIds": [ # IDs of the Long Running Operations (LROs) currently running for this
+        # schema.
+      "A String",
+    ],
+    "displayName": "A String", # Required. Display name of the datasource
+        # The maximum length is 300 characters.
+    "name": "A String", # Name of the datasource resource.
+        # Format: datasources/{source_id}.
+        # <br />The name is ignored when creating a datasource.
+    "disableModifications": True or False, # If true, Indexing API rejects any modification calls to this datasource
+        # such as create, update, and delete.
+        # Disabling this does not imply halting process of previously
+        # accepted data.
+    "indexingServiceAccounts": [ # List of service accounts that have indexing access.
+      "A String",
+    ],
+    "itemsVisibility": [ # This field restricts visibility to items at the datasource level. Items
+        # within the datasource are restricted to the union of users and groups
+        # included in this field. Note that, this does not ensure access to a
+        # specific item, as users need to have ACL permissions on the contained
+        # items. This ensures a high level access on the entire datasource, and
+        # that the individual items are not shared outside this visibility.
+      {
+        "gsuiteUserEmail": "A String", # This principal references a G Suite user account
+        "gsuiteDomain": True or False, # This principal represents all users of the G Suite domain of the
+            # customer.
+        "gsuiteGroupEmail": "A String", # This principal references a G Suite group account
+      },
+    ],
+    "shortName": "A String", # A short name or alias for the source.  This value will be used to match the
+        # 'source' operator. For example, if the short name is *&lt;value&gt;* then
+        # queries like *source:&lt;value&gt;* will only return results for this
+        # source. The value must be unique across all datasources. The value must
+        # only contain alphanumeric characters (a-zA-Z0-9). The value cannot start
+        # with 'google' and cannot be one of the following: mail, gmail, docs, drive,
+        # groups, sites, calendar, hangouts, gplus, keep, people, teams.
+        # Its maximum length is 32 characters.
+    "disableServing": True or False, # Disable serving any search or assist results.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="delete">delete(name, debugOptions_enableDebugging=None, x__xgafv=None)</code>
+  <pre>Deletes a datasource.
+
+Args:
+  name: string, Name of the datasource.
+Format: datasources/{source_id}. (required)
+  debugOptions_enableDebugging: boolean, If you are asked by Google to help with debugging, set this field.
+Otherwise, ignore this field.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(name, debugOptions_enableDebugging=None, x__xgafv=None)</code>
+  <pre>Gets a datasource.
+
+Args:
+  name: string, Name of the datasource resource.
+Format: datasources/{source_id}. (required)
+  debugOptions_enableDebugging: boolean, If you are asked by Google to help with debugging, set this field.
+Otherwise, ignore this field.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Datasource is a logical namespace for items to be indexed.
+        # All items must belong to a datasource.  This is the prerequisite before
+        # items can be indexed into Cloud Search.
+      "operationIds": [ # IDs of the Long Running Operations (LROs) currently running for this
+          # schema.
+        "A String",
+      ],
+      "displayName": "A String", # Required. Display name of the datasource
+          # The maximum length is 300 characters.
+      "name": "A String", # Name of the datasource resource.
+          # Format: datasources/{source_id}.
+          # <br />The name is ignored when creating a datasource.
+      "disableModifications": True or False, # If true, Indexing API rejects any modification calls to this datasource
+          # such as create, update, and delete.
+          # Disabling this does not imply halting process of previously
+          # accepted data.
+      "indexingServiceAccounts": [ # List of service accounts that have indexing access.
+        "A String",
+      ],
+      "itemsVisibility": [ # This field restricts visibility to items at the datasource level. Items
+          # within the datasource are restricted to the union of users and groups
+          # included in this field. Note that, this does not ensure access to a
+          # specific item, as users need to have ACL permissions on the contained
+          # items. This ensures a high level access on the entire datasource, and
+          # that the individual items are not shared outside this visibility.
+        {
+          "gsuiteUserEmail": "A String", # This principal references a G Suite user account
+          "gsuiteDomain": True or False, # This principal represents all users of the G Suite domain of the
+              # customer.
+          "gsuiteGroupEmail": "A String", # This principal references a G Suite group account
+        },
+      ],
+      "shortName": "A String", # A short name or alias for the source.  This value will be used to match the
+          # 'source' operator. For example, if the short name is *&lt;value&gt;* then
+          # queries like *source:&lt;value&gt;* will only return results for this
+          # source. The value must be unique across all datasources. The value must
+          # only contain alphanumeric characters (a-zA-Z0-9). The value cannot start
+          # with 'google' and cannot be one of the following: mail, gmail, docs, drive,
+          # groups, sites, calendar, hangouts, gplus, keep, people, teams.
+          # Its maximum length is 32 characters.
+      "disableServing": True or False, # Disable serving any search or assist results.
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(pageSize=None, debugOptions_enableDebugging=None, pageToken=None, x__xgafv=None)</code>
+  <pre>Lists datasources.
+
+Args:
+  pageSize: integer, Maximum number of datasources to fetch in a request.
+The max value is 100.
+<br />The default value is 10
+  debugOptions_enableDebugging: boolean, If you are asked by Google to help with debugging, set this field.
+Otherwise, ignore this field.
+  pageToken: string, Starting index of the results.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    {
+    "nextPageToken": "A String", # Token to retrieve the next page of results, or empty if there are no
+        # more results in the list.
+    "sources": [
+      { # Datasource is a logical namespace for items to be indexed.
+            # All items must belong to a datasource.  This is the prerequisite before
+            # items can be indexed into Cloud Search.
+          "operationIds": [ # IDs of the Long Running Operations (LROs) currently running for this
+              # schema.
+            "A String",
+          ],
+          "displayName": "A String", # Required. Display name of the datasource
+              # The maximum length is 300 characters.
+          "name": "A String", # Name of the datasource resource.
+              # Format: datasources/{source_id}.
+              # <br />The name is ignored when creating a datasource.
+          "disableModifications": True or False, # If true, Indexing API rejects any modification calls to this datasource
+              # such as create, update, and delete.
+              # Disabling this does not imply halting process of previously
+              # accepted data.
+          "indexingServiceAccounts": [ # List of service accounts that have indexing access.
+            "A String",
+          ],
+          "itemsVisibility": [ # This field restricts visibility to items at the datasource level. Items
+              # within the datasource are restricted to the union of users and groups
+              # included in this field. Note that, this does not ensure access to a
+              # specific item, as users need to have ACL permissions on the contained
+              # items. This ensures a high level access on the entire datasource, and
+              # that the individual items are not shared outside this visibility.
+            {
+              "gsuiteUserEmail": "A String", # This principal references a G Suite user account
+              "gsuiteDomain": True or False, # This principal represents all users of the G Suite domain of the
+                  # customer.
+              "gsuiteGroupEmail": "A String", # This principal references a G Suite group account
+            },
+          ],
+          "shortName": "A String", # A short name or alias for the source.  This value will be used to match the
+              # 'source' operator. For example, if the short name is *&lt;value&gt;* then
+              # queries like *source:&lt;value&gt;* will only return results for this
+              # source. The value must be unique across all datasources. The value must
+              # only contain alphanumeric characters (a-zA-Z0-9). The value cannot start
+              # with 'google' and cannot be one of the following: mail, gmail, docs, drive,
+              # groups, sites, calendar, hangouts, gplus, keep, people, teams.
+              # Its maximum length is 32 characters.
+          "disableServing": True or False, # Disable serving any search or assist results.
+        },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
+    <code class="details" id="update">update(name, body, x__xgafv=None)</code>
+  <pre>Updates a datasource.
+
+Args:
+  name: string, Name of the datasource resource.
+Format: datasources/{source_id}.
+<br />The name is ignored when creating a datasource. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{
+    "source": { # Datasource is a logical namespace for items to be indexed.
+          # All items must belong to a datasource.  This is the prerequisite before
+          # items can be indexed into Cloud Search.
+        "operationIds": [ # IDs of the Long Running Operations (LROs) currently running for this
+            # schema.
+          "A String",
+        ],
+        "displayName": "A String", # Required. Display name of the datasource
+            # The maximum length is 300 characters.
+        "name": "A String", # Name of the datasource resource.
+            # Format: datasources/{source_id}.
+            # <br />The name is ignored when creating a datasource.
+        "disableModifications": True or False, # If true, Indexing API rejects any modification calls to this datasource
+            # such as create, update, and delete.
+            # Disabling this does not imply halting process of previously
+            # accepted data.
+        "indexingServiceAccounts": [ # List of service accounts that have indexing access.
+          "A String",
+        ],
+        "itemsVisibility": [ # This field restricts visibility to items at the datasource level. Items
+            # within the datasource are restricted to the union of users and groups
+            # included in this field. Note that, this does not ensure access to a
+            # specific item, as users need to have ACL permissions on the contained
+            # items. This ensures a high level access on the entire datasource, and
+            # that the individual items are not shared outside this visibility.
+          {
+            "gsuiteUserEmail": "A String", # This principal references a G Suite user account
+            "gsuiteDomain": True or False, # This principal represents all users of the G Suite domain of the
+                # customer.
+            "gsuiteGroupEmail": "A String", # This principal references a G Suite group account
+          },
+        ],
+        "shortName": "A String", # A short name or alias for the source.  This value will be used to match the
+            # 'source' operator. For example, if the short name is *&lt;value&gt;* then
+            # queries like *source:&lt;value&gt;* will only return results for this
+            # source. The value must be unique across all datasources. The value must
+            # only contain alphanumeric characters (a-zA-Z0-9). The value cannot start
+            # with 'google' and cannot be one of the following: mail, gmail, docs, drive,
+            # groups, sites, calendar, hangouts, gplus, keep, people, teams.
+            # Its maximum length is 32 characters.
+        "disableServing": True or False, # Disable serving any search or assist results.
+      },
+    "debugOptions": { # Shared request debug options for all cloudsearch RPC methods. # Common debug options.
+      "enableDebugging": True or False, # If you are asked by Google to help with debugging, set this field.
+          # Otherwise, ignore this field.
+    },
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+</body></html>
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