Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="cloudiot_v1.html">Cloud IoT API</a> . <a href="cloudiot_v1.projects.html">projects</a> . <a href="cloudiot_v1.projects.locations.html">locations</a> . <a href="cloudiot_v1.projects.locations.registries.html">registries</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="cloudiot_v1.projects.locations.registries.devices.html">devices()</a></code>
+</p>
+<p class="firstline">Returns the devices Resource.</p>
+
+<p class="toc_element">
+  <code><a href="cloudiot_v1.projects.locations.registries.groups.html">groups()</a></code>
+</p>
+<p class="firstline">Returns the groups Resource.</p>
+
+<p class="toc_element">
+  <code><a href="#bindDeviceToGateway">bindDeviceToGateway(parent, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Associates the device with the gateway.</p>
+<p class="toc_element">
+  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates a device registry that contains devices.</p>
+<p class="toc_element">
+  <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes a device registry configuration.</p>
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets a device registry configuration.</p>
+<p class="toc_element">
+  <code><a href="#getIamPolicy">getIamPolicy(resource, body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets the access control policy for a resource.</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists device registries.</p>
+<p class="toc_element">
+  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<p class="toc_element">
+  <code><a href="#patch">patch(name, body, updateMask=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Updates a device registry configuration.</p>
+<p class="toc_element">
+  <code><a href="#setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Sets the access control policy on the specified resource. Replaces any</p>
+<p class="toc_element">
+  <code><a href="#testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns permissions that a caller has on the specified resource.</p>
+<p class="toc_element">
+  <code><a href="#unbindDeviceFromGateway">unbindDeviceFromGateway(parent, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes the association between the device and the gateway.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="bindDeviceToGateway">bindDeviceToGateway(parent, body, x__xgafv=None)</code>
+  <pre>Associates the device with the gateway.
+
+Args:
+  parent: string, The name of the registry. For example,
+`projects/example-project/locations/us-central1/registries/my-registry`. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request for `BindDeviceToGateway`.
+    "gatewayId": "A String", # The value of `gateway_id` can be either the device numeric ID or the
+        # user-defined device identifier.
+    "deviceId": "A String", # The device to associate with the specified gateway. The value of
+        # `device_id` can be either the device numeric ID or the user-defined device
+        # identifier.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response for `BindDeviceToGateway`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+  <pre>Creates a device registry that contains devices.
+
+Args:
+  parent: string, The project and cloud region where this device registry must be created.
+For example, `projects/example-project/locations/us-central1`. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # A container for a group of devices.
+  "name": "A String", # The resource path name. For example,
+      # `projects/example-project/locations/us-central1/registries/my-registry`.
+  "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+      # State updates are guaranteed to be stored in the state history, but
+      # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+      # permissions are misconfigured or the specified topic doesn't exist, no
+      # notification will be published but the state will still be stored in Cloud
+      # IoT Core.
+    "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+        # `projects/myProject/topics/deviceEvents`.
+  },
+  "logLevel": "A String", # **Beta Feature**
+      # 
+      # The default logging verbosity for activity from devices in this registry.
+      # The verbosity level can be overridden by Device.log_level.
+  "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+      # device. All telemetry events that were successfully published by the
+      # device and acknowledged by Cloud IoT Core are guaranteed to be
+      # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+      # only the first matching configuration is used. If you try to publish a
+      # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+      # for the device's registry, the connection closes automatically. If you try
+      # to do so using an HTTP connection, an error is returned. Up to 10
+      # configurations may be provided.
+    { # The configuration for forwarding telemetry events.
+      "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+          # `projects/myProject/topics/deviceEvents`.
+      "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+          # be used. The string must not include the leading '/' character. If empty,
+          # all strings are matched. This field is used only for telemetry events;
+          # subfolders are not supported for state changes.
+    },
+  ],
+  "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+    "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+        # Otherwise, any requests to DeviceService will fail for this registry.
+  },
+  "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+    "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+        # connections to this registry will fail.
+  },
+  "credentials": [ # The credentials used to verify the device credentials. No more than 10
+      # credentials can be bound to a single registry at a time. The verification
+      # process occurs at the time of device creation or update. If this field is
+      # empty, no verification is performed. Otherwise, the credentials of a newly
+      # created device or added credentials of an updated device should be signed
+      # with one of these registry credentials.
+      # 
+      # Note, however, that existing devices will never be affected by
+      # modifications to this list of credentials: after a device has been
+      # successfully created in a registry, it should be able to connect even if
+      # its registry credentials are revoked, deleted, or modified.
+    { # A server-stored registry credential used to validate device credentials.
+      "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+        "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+          "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+          "expiryTime": "A String", # The time the certificate becomes invalid.
+          "publicKeyType": "A String", # The type of public key in the certificate.
+          "startTime": "A String", # The time the certificate becomes valid.
+          "subject": "A String", # The entity the certificate and public key belong to.
+          "issuer": "A String", # The entity that signed the certificate.
+        },
+        "certificate": "A String", # The certificate data.
+        "format": "A String", # The certificate format.
+      },
+    },
+  ],
+  "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+}
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A container for a group of devices.
+    "name": "A String", # The resource path name. For example,
+        # `projects/example-project/locations/us-central1/registries/my-registry`.
+    "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+        # State updates are guaranteed to be stored in the state history, but
+        # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+        # permissions are misconfigured or the specified topic doesn't exist, no
+        # notification will be published but the state will still be stored in Cloud
+        # IoT Core.
+      "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+          # `projects/myProject/topics/deviceEvents`.
+    },
+    "logLevel": "A String", # **Beta Feature**
+        #
+        # The default logging verbosity for activity from devices in this registry.
+        # The verbosity level can be overridden by Device.log_level.
+    "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+        # device. All telemetry events that were successfully published by the
+        # device and acknowledged by Cloud IoT Core are guaranteed to be
+        # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+        # only the first matching configuration is used. If you try to publish a
+        # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+        # for the device's registry, the connection closes automatically. If you try
+        # to do so using an HTTP connection, an error is returned. Up to 10
+        # configurations may be provided.
+      { # The configuration for forwarding telemetry events.
+        "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+            # `projects/myProject/topics/deviceEvents`.
+        "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+            # be used. The string must not include the leading '/' character. If empty,
+            # all strings are matched. This field is used only for telemetry events;
+            # subfolders are not supported for state changes.
+      },
+    ],
+    "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+      "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+          # Otherwise, any requests to DeviceService will fail for this registry.
+    },
+    "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+      "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+          # connections to this registry will fail.
+    },
+    "credentials": [ # The credentials used to verify the device credentials. No more than 10
+        # credentials can be bound to a single registry at a time. The verification
+        # process occurs at the time of device creation or update. If this field is
+        # empty, no verification is performed. Otherwise, the credentials of a newly
+        # created device or added credentials of an updated device should be signed
+        # with one of these registry credentials.
+        #
+        # Note, however, that existing devices will never be affected by
+        # modifications to this list of credentials: after a device has been
+        # successfully created in a registry, it should be able to connect even if
+        # its registry credentials are revoked, deleted, or modified.
+      { # A server-stored registry credential used to validate device credentials.
+        "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+          "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+            "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+            "expiryTime": "A String", # The time the certificate becomes invalid.
+            "publicKeyType": "A String", # The type of public key in the certificate.
+            "startTime": "A String", # The time the certificate becomes valid.
+            "subject": "A String", # The entity the certificate and public key belong to.
+            "issuer": "A String", # The entity that signed the certificate.
+          },
+          "certificate": "A String", # The certificate data.
+          "format": "A String", # The certificate format.
+        },
+      },
+    ],
+    "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="delete">delete(name, x__xgafv=None)</code>
+  <pre>Deletes a device registry configuration.
+
+Args:
+  name: string, The name of the device registry. For example,
+`projects/example-project/locations/us-central1/registries/my-registry`. (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 `{}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(name, x__xgafv=None)</code>
+  <pre>Gets a device registry configuration.
+
+Args:
+  name: string, The name of the device registry. For example,
+`projects/example-project/locations/us-central1/registries/my-registry`. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A container for a group of devices.
+    "name": "A String", # The resource path name. For example,
+        # `projects/example-project/locations/us-central1/registries/my-registry`.
+    "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+        # State updates are guaranteed to be stored in the state history, but
+        # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+        # permissions are misconfigured or the specified topic doesn't exist, no
+        # notification will be published but the state will still be stored in Cloud
+        # IoT Core.
+      "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+          # `projects/myProject/topics/deviceEvents`.
+    },
+    "logLevel": "A String", # **Beta Feature**
+        #
+        # The default logging verbosity for activity from devices in this registry.
+        # The verbosity level can be overridden by Device.log_level.
+    "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+        # device. All telemetry events that were successfully published by the
+        # device and acknowledged by Cloud IoT Core are guaranteed to be
+        # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+        # only the first matching configuration is used. If you try to publish a
+        # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+        # for the device's registry, the connection closes automatically. If you try
+        # to do so using an HTTP connection, an error is returned. Up to 10
+        # configurations may be provided.
+      { # The configuration for forwarding telemetry events.
+        "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+            # `projects/myProject/topics/deviceEvents`.
+        "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+            # be used. The string must not include the leading '/' character. If empty,
+            # all strings are matched. This field is used only for telemetry events;
+            # subfolders are not supported for state changes.
+      },
+    ],
+    "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+      "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+          # Otherwise, any requests to DeviceService will fail for this registry.
+    },
+    "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+      "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+          # connections to this registry will fail.
+    },
+    "credentials": [ # The credentials used to verify the device credentials. No more than 10
+        # credentials can be bound to a single registry at a time. The verification
+        # process occurs at the time of device creation or update. If this field is
+        # empty, no verification is performed. Otherwise, the credentials of a newly
+        # created device or added credentials of an updated device should be signed
+        # with one of these registry credentials.
+        #
+        # Note, however, that existing devices will never be affected by
+        # modifications to this list of credentials: after a device has been
+        # successfully created in a registry, it should be able to connect even if
+        # its registry credentials are revoked, deleted, or modified.
+      { # A server-stored registry credential used to validate device credentials.
+        "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+          "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+            "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+            "expiryTime": "A String", # The time the certificate becomes invalid.
+            "publicKeyType": "A String", # The type of public key in the certificate.
+            "startTime": "A String", # The time the certificate becomes valid.
+            "subject": "A String", # The entity the certificate and public key belong to.
+            "issuer": "A String", # The entity that signed the certificate.
+          },
+          "certificate": "A String", # The certificate data.
+          "format": "A String", # The certificate format.
+        },
+      },
+    ],
+    "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="getIamPolicy">getIamPolicy(resource, body=None, x__xgafv=None)</code>
+  <pre>Gets the access control policy for a resource.
+Returns an empty policy if the resource exists and does not have a policy
+set.
+
+Args:
+  resource: string, REQUIRED: The resource for which the policy is being requested.
+See the operation documentation for the appropriate value for this field. (required)
+  body: object, The request body.
+    The object takes the form of:
+
+{ # Request message for `GetIamPolicy` method.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Defines an Identity and Access Management (IAM) policy. It is used to
+      # specify access control policies for Cloud Platform resources.
+      #
+      #
+      # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
+      # `members` to a `role`, where the members can be user accounts, Google groups,
+      # Google domains, and service accounts. A `role` is a named list of permissions
+      # defined by IAM.
+      #
+      # **JSON Example**
+      #
+      #     {
+      #       "bindings": [
+      #         {
+      #           "role": "roles/owner",
+      #           "members": [
+      #             "user:mike@example.com",
+      #             "group:admins@example.com",
+      #             "domain:google.com",
+      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+      #           ]
+      #         },
+      #         {
+      #           "role": "roles/viewer",
+      #           "members": ["user:sean@example.com"]
+      #         }
+      #       ]
+      #     }
+      #
+      # **YAML Example**
+      #
+      #     bindings:
+      #     - members:
+      #       - user:mike@example.com
+      #       - group:admins@example.com
+      #       - domain:google.com
+      #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
+      #       role: roles/owner
+      #     - members:
+      #       - user:sean@example.com
+      #       role: roles/viewer
+      #
+      #
+      # For a description of IAM and its features, see the
+      # [IAM developer's guide](https://cloud.google.com/iam/docs).
+    "bindings": [ # Associates a list of `members` to a `role`.
+        # `bindings` with no members will result in an error.
+      { # Associates `members` with a `role`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@gmail.com` .
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            #
+            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+        "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
+            # NOTE: An unsatisfied condition will not allow user access via current
+            # binding. Different bindings, including their conditions, are examined
+            # independently.
+            #
+            #     title: "User account presence"
+            #     description: "Determines whether the request has a user account"
+            #     expression: "size(request.user) > 0"
+          "location": "A String", # An optional string indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          "expression": "A String", # Textual representation of an expression in
+              # Common Expression Language syntax.
+              #
+              # The application context of the containing message determines which
+              # well-known feature set of CEL is supported.
+          "description": "A String", # An optional description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          "title": "A String", # An optional title for the expression, i.e. a short string describing
+              # its purpose. This can be used e.g. in UIs which allow to enter the
+              # expression.
+        },
+      },
+    ],
+    "version": 42, # Deprecated.
+    "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+        # policy is overwritten blindly.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</code>
+  <pre>Lists device registries.
+
+Args:
+  parent: string, The project and cloud region path. For example,
+`projects/example-project/locations/us-central1`. (required)
+  pageSize: integer, The maximum number of registries to return in the response. If this value
+is zero, the service will select a default size. A call may return fewer
+objects than requested. A non-empty `next_page_token` in the response
+indicates that more data is available.
+  pageToken: string, The value returned by the last `ListDeviceRegistriesResponse`; indicates
+that this is a continuation of a prior `ListDeviceRegistries` call and
+the system should return the next page of data.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response for `ListDeviceRegistries`.
+    "nextPageToken": "A String", # If not empty, indicates that there may be more registries that match the
+        # request; this value should be passed in a new
+        # `ListDeviceRegistriesRequest`.
+    "deviceRegistries": [ # The registries that matched the query.
+      { # A container for a group of devices.
+        "name": "A String", # The resource path name. For example,
+            # `projects/example-project/locations/us-central1/registries/my-registry`.
+        "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+            # State updates are guaranteed to be stored in the state history, but
+            # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+            # permissions are misconfigured or the specified topic doesn't exist, no
+            # notification will be published but the state will still be stored in Cloud
+            # IoT Core.
+          "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+              # `projects/myProject/topics/deviceEvents`.
+        },
+        "logLevel": "A String", # **Beta Feature**
+            #
+            # The default logging verbosity for activity from devices in this registry.
+            # The verbosity level can be overridden by Device.log_level.
+        "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+            # device. All telemetry events that were successfully published by the
+            # device and acknowledged by Cloud IoT Core are guaranteed to be
+            # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+            # only the first matching configuration is used. If you try to publish a
+            # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+            # for the device's registry, the connection closes automatically. If you try
+            # to do so using an HTTP connection, an error is returned. Up to 10
+            # configurations may be provided.
+          { # The configuration for forwarding telemetry events.
+            "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+                # `projects/myProject/topics/deviceEvents`.
+            "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+                # be used. The string must not include the leading '/' character. If empty,
+                # all strings are matched. This field is used only for telemetry events;
+                # subfolders are not supported for state changes.
+          },
+        ],
+        "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+          "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+              # Otherwise, any requests to DeviceService will fail for this registry.
+        },
+        "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+          "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+              # connections to this registry will fail.
+        },
+        "credentials": [ # The credentials used to verify the device credentials. No more than 10
+            # credentials can be bound to a single registry at a time. The verification
+            # process occurs at the time of device creation or update. If this field is
+            # empty, no verification is performed. Otherwise, the credentials of a newly
+            # created device or added credentials of an updated device should be signed
+            # with one of these registry credentials.
+            #
+            # Note, however, that existing devices will never be affected by
+            # modifications to this list of credentials: after a device has been
+            # successfully created in a registry, it should be able to connect even if
+            # its registry credentials are revoked, deleted, or modified.
+          { # A server-stored registry credential used to validate device credentials.
+            "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+              "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+                "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+                "expiryTime": "A String", # The time the certificate becomes invalid.
+                "publicKeyType": "A String", # The type of public key in the certificate.
+                "startTime": "A String", # The time the certificate becomes valid.
+                "subject": "A String", # The entity the certificate and public key belong to.
+                "issuer": "A String", # The entity that signed the certificate.
+              },
+              "certificate": "A String", # The certificate data.
+              "format": "A String", # The certificate format.
+            },
+          },
+        ],
+        "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+      },
+    ],
+  }</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="patch">patch(name, body, updateMask=None, x__xgafv=None)</code>
+  <pre>Updates a device registry configuration.
+
+Args:
+  name: string, The resource path name. For example,
+`projects/example-project/locations/us-central1/registries/my-registry`. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # A container for a group of devices.
+  "name": "A String", # The resource path name. For example,
+      # `projects/example-project/locations/us-central1/registries/my-registry`.
+  "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+      # State updates are guaranteed to be stored in the state history, but
+      # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+      # permissions are misconfigured or the specified topic doesn't exist, no
+      # notification will be published but the state will still be stored in Cloud
+      # IoT Core.
+    "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+        # `projects/myProject/topics/deviceEvents`.
+  },
+  "logLevel": "A String", # **Beta Feature**
+      # 
+      # The default logging verbosity for activity from devices in this registry.
+      # The verbosity level can be overridden by Device.log_level.
+  "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+      # device. All telemetry events that were successfully published by the
+      # device and acknowledged by Cloud IoT Core are guaranteed to be
+      # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+      # only the first matching configuration is used. If you try to publish a
+      # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+      # for the device's registry, the connection closes automatically. If you try
+      # to do so using an HTTP connection, an error is returned. Up to 10
+      # configurations may be provided.
+    { # The configuration for forwarding telemetry events.
+      "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+          # `projects/myProject/topics/deviceEvents`.
+      "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+          # be used. The string must not include the leading '/' character. If empty,
+          # all strings are matched. This field is used only for telemetry events;
+          # subfolders are not supported for state changes.
+    },
+  ],
+  "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+    "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+        # Otherwise, any requests to DeviceService will fail for this registry.
+  },
+  "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+    "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+        # connections to this registry will fail.
+  },
+  "credentials": [ # The credentials used to verify the device credentials. No more than 10
+      # credentials can be bound to a single registry at a time. The verification
+      # process occurs at the time of device creation or update. If this field is
+      # empty, no verification is performed. Otherwise, the credentials of a newly
+      # created device or added credentials of an updated device should be signed
+      # with one of these registry credentials.
+      # 
+      # Note, however, that existing devices will never be affected by
+      # modifications to this list of credentials: after a device has been
+      # successfully created in a registry, it should be able to connect even if
+      # its registry credentials are revoked, deleted, or modified.
+    { # A server-stored registry credential used to validate device credentials.
+      "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+        "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+          "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+          "expiryTime": "A String", # The time the certificate becomes invalid.
+          "publicKeyType": "A String", # The type of public key in the certificate.
+          "startTime": "A String", # The time the certificate becomes valid.
+          "subject": "A String", # The entity the certificate and public key belong to.
+          "issuer": "A String", # The entity that signed the certificate.
+        },
+        "certificate": "A String", # The certificate data.
+        "format": "A String", # The certificate format.
+      },
+    },
+  ],
+  "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+}
+
+  updateMask: string, Only updates the `device_registry` fields indicated by this mask.
+The field mask must not be empty, and it must not contain fields that
+are immutable or only set by the server.
+Mutable top-level fields: `event_notification_config`, `http_config`,
+`mqtt_config`, and `state_notification_config`.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A container for a group of devices.
+    "name": "A String", # The resource path name. For example,
+        # `projects/example-project/locations/us-central1/registries/my-registry`.
+    "stateNotificationConfig": { # The configuration for notification of new states received from the device. # The configuration for notification of new states received from the device.
+        # State updates are guaranteed to be stored in the state history, but
+        # notifications to Cloud Pub/Sub are not guaranteed. For example, if
+        # permissions are misconfigured or the specified topic doesn't exist, no
+        # notification will be published but the state will still be stored in Cloud
+        # IoT Core.
+      "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+          # `projects/myProject/topics/deviceEvents`.
+    },
+    "logLevel": "A String", # **Beta Feature**
+        #
+        # The default logging verbosity for activity from devices in this registry.
+        # The verbosity level can be overridden by Device.log_level.
+    "eventNotificationConfigs": [ # The configuration for notification of telemetry events received from the
+        # device. All telemetry events that were successfully published by the
+        # device and acknowledged by Cloud IoT Core are guaranteed to be
+        # delivered to Cloud Pub/Sub. If multiple configurations match a message,
+        # only the first matching configuration is used. If you try to publish a
+        # device telemetry event using MQTT without specifying a Cloud Pub/Sub topic
+        # for the device's registry, the connection closes automatically. If you try
+        # to do so using an HTTP connection, an error is returned. Up to 10
+        # configurations may be provided.
+      { # The configuration for forwarding telemetry events.
+        "pubsubTopicName": "A String", # A Cloud Pub/Sub topic name. For example,
+            # `projects/myProject/topics/deviceEvents`.
+        "subfolderMatches": "A String", # If the subfolder name matches this string exactly, this configuration will
+            # be used. The string must not include the leading '/' character. If empty,
+            # all strings are matched. This field is used only for telemetry events;
+            # subfolders are not supported for state changes.
+      },
+    ],
+    "httpConfig": { # The configuration of the HTTP bridge for a device registry. # The DeviceService (HTTP) configuration for this device registry.
+      "httpEnabledState": "A String", # If enabled, allows devices to use DeviceService via the HTTP protocol.
+          # Otherwise, any requests to DeviceService will fail for this registry.
+    },
+    "mqttConfig": { # The configuration of MQTT for a device registry. # The MQTT configuration for this device registry.
+      "mqttEnabledState": "A String", # If enabled, allows connections using the MQTT protocol. Otherwise, MQTT
+          # connections to this registry will fail.
+    },
+    "credentials": [ # The credentials used to verify the device credentials. No more than 10
+        # credentials can be bound to a single registry at a time. The verification
+        # process occurs at the time of device creation or update. If this field is
+        # empty, no verification is performed. Otherwise, the credentials of a newly
+        # created device or added credentials of an updated device should be signed
+        # with one of these registry credentials.
+        #
+        # Note, however, that existing devices will never be affected by
+        # modifications to this list of credentials: after a device has been
+        # successfully created in a registry, it should be able to connect even if
+        # its registry credentials are revoked, deleted, or modified.
+      { # A server-stored registry credential used to validate device credentials.
+        "publicKeyCertificate": { # A public key certificate format and data. # A public key certificate used to verify the device credentials.
+          "x509Details": { # Details of an X.509 certificate. For informational purposes only. # [Output only] The certificate details. Used only for X.509 certificates.
+            "signatureAlgorithm": "A String", # The algorithm used to sign the certificate.
+            "expiryTime": "A String", # The time the certificate becomes invalid.
+            "publicKeyType": "A String", # The type of public key in the certificate.
+            "startTime": "A String", # The time the certificate becomes valid.
+            "subject": "A String", # The entity the certificate and public key belong to.
+            "issuer": "A String", # The entity that signed the certificate.
+          },
+          "certificate": "A String", # The certificate data.
+          "format": "A String", # The certificate format.
+        },
+      },
+    ],
+    "id": "A String", # The identifier of this device registry. For example, `myRegistry`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</code>
+  <pre>Sets the access control policy on the specified resource. Replaces any
+existing policy.
+
+Args:
+  resource: string, REQUIRED: The resource for which the policy is being specified.
+See the operation documentation for the appropriate value for this field. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request message for `SetIamPolicy` method.
+    "policy": { # Defines an Identity and Access Management (IAM) policy. It is used to # REQUIRED: The complete policy to be applied to the `resource`. The size of
+        # the policy is limited to a few 10s of KB. An empty policy is a
+        # valid policy but certain Cloud Platform services (such as Projects)
+        # might reject them.
+        # specify access control policies for Cloud Platform resources.
+        #
+        #
+        # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
+        # `members` to a `role`, where the members can be user accounts, Google groups,
+        # Google domains, and service accounts. A `role` is a named list of permissions
+        # defined by IAM.
+        #
+        # **JSON Example**
+        #
+        #     {
+        #       "bindings": [
+        #         {
+        #           "role": "roles/owner",
+        #           "members": [
+        #             "user:mike@example.com",
+        #             "group:admins@example.com",
+        #             "domain:google.com",
+        #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+        #           ]
+        #         },
+        #         {
+        #           "role": "roles/viewer",
+        #           "members": ["user:sean@example.com"]
+        #         }
+        #       ]
+        #     }
+        #
+        # **YAML Example**
+        #
+        #     bindings:
+        #     - members:
+        #       - user:mike@example.com
+        #       - group:admins@example.com
+        #       - domain:google.com
+        #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
+        #       role: roles/owner
+        #     - members:
+        #       - user:sean@example.com
+        #       role: roles/viewer
+        #
+        #
+        # For a description of IAM and its features, see the
+        # [IAM developer's guide](https://cloud.google.com/iam/docs).
+      "bindings": [ # Associates a list of `members` to a `role`.
+          # `bindings` with no members will result in an error.
+        { # Associates `members` with a `role`.
+          "role": "A String", # Role that is assigned to `members`.
+              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+          "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+              # `members` can have the following values:
+              #
+              # * `allUsers`: A special identifier that represents anyone who is
+              #    on the internet; with or without a Google account.
+              #
+              # * `allAuthenticatedUsers`: A special identifier that represents anyone
+              #    who is authenticated with a Google account or a service account.
+              #
+              # * `user:{emailid}`: An email address that represents a specific Google
+              #    account. For example, `alice@gmail.com` .
+              #
+              #
+              # * `serviceAccount:{emailid}`: An email address that represents a service
+              #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+              #
+              # * `group:{emailid}`: An email address that represents a Google group.
+              #    For example, `admins@example.com`.
+              #
+              #
+              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+              #    users of that domain. For example, `google.com` or `example.com`.
+              #
+            "A String",
+          ],
+          "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
+              # NOTE: An unsatisfied condition will not allow user access via current
+              # binding. Different bindings, including their conditions, are examined
+              # independently.
+              #
+              #     title: "User account presence"
+              #     description: "Determines whether the request has a user account"
+              #     expression: "size(request.user) > 0"
+            "location": "A String", # An optional string indicating the location of the expression for error
+                # reporting, e.g. a file name and a position in the file.
+            "expression": "A String", # Textual representation of an expression in
+                # Common Expression Language syntax.
+                #
+                # The application context of the containing message determines which
+                # well-known feature set of CEL is supported.
+            "description": "A String", # An optional description of the expression. This is a longer text which
+                # describes the expression, e.g. when hovered over it in a UI.
+            "title": "A String", # An optional title for the expression, i.e. a short string describing
+                # its purpose. This can be used e.g. in UIs which allow to enter the
+                # expression.
+          },
+        },
+      ],
+      "version": 42, # Deprecated.
+      "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+          # prevent simultaneous updates of a policy from overwriting each other.
+          # It is strongly suggested that systems make use of the `etag` in the
+          # read-modify-write cycle to perform policy updates in order to avoid race
+          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+          # systems are expected to put that etag in the request to `setIamPolicy` to
+          # ensure that their change will be applied to the same version of the policy.
+          #
+          # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+          # policy is overwritten blindly.
+    },
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Defines an Identity and Access Management (IAM) policy. It is used to
+      # specify access control policies for Cloud Platform resources.
+      #
+      #
+      # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
+      # `members` to a `role`, where the members can be user accounts, Google groups,
+      # Google domains, and service accounts. A `role` is a named list of permissions
+      # defined by IAM.
+      #
+      # **JSON Example**
+      #
+      #     {
+      #       "bindings": [
+      #         {
+      #           "role": "roles/owner",
+      #           "members": [
+      #             "user:mike@example.com",
+      #             "group:admins@example.com",
+      #             "domain:google.com",
+      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+      #           ]
+      #         },
+      #         {
+      #           "role": "roles/viewer",
+      #           "members": ["user:sean@example.com"]
+      #         }
+      #       ]
+      #     }
+      #
+      # **YAML Example**
+      #
+      #     bindings:
+      #     - members:
+      #       - user:mike@example.com
+      #       - group:admins@example.com
+      #       - domain:google.com
+      #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
+      #       role: roles/owner
+      #     - members:
+      #       - user:sean@example.com
+      #       role: roles/viewer
+      #
+      #
+      # For a description of IAM and its features, see the
+      # [IAM developer's guide](https://cloud.google.com/iam/docs).
+    "bindings": [ # Associates a list of `members` to a `role`.
+        # `bindings` with no members will result in an error.
+      { # Associates `members` with a `role`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@gmail.com` .
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            #
+            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+        "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
+            # NOTE: An unsatisfied condition will not allow user access via current
+            # binding. Different bindings, including their conditions, are examined
+            # independently.
+            #
+            #     title: "User account presence"
+            #     description: "Determines whether the request has a user account"
+            #     expression: "size(request.user) > 0"
+          "location": "A String", # An optional string indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          "expression": "A String", # Textual representation of an expression in
+              # Common Expression Language syntax.
+              #
+              # The application context of the containing message determines which
+              # well-known feature set of CEL is supported.
+          "description": "A String", # An optional description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          "title": "A String", # An optional title for the expression, i.e. a short string describing
+              # its purpose. This can be used e.g. in UIs which allow to enter the
+              # expression.
+        },
+      },
+    ],
+    "version": 42, # Deprecated.
+    "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+        # policy is overwritten blindly.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</code>
+  <pre>Returns permissions that a caller has on the specified resource.
+If the resource does not exist, this will return an empty set of
+permissions, not a NOT_FOUND error.
+
+Args:
+  resource: string, REQUIRED: The resource for which the policy detail is being requested.
+See the operation documentation for the appropriate value for this field. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request message for `TestIamPermissions` method.
+    "permissions": [ # The set of permissions to check for the `resource`. Permissions with
+        # wildcards (such as '*' or 'storage.*') are not allowed. For more
+        # information see
+        # [IAM Overview](https://cloud.google.com/iam/docs/overview#permissions).
+      "A String",
+    ],
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response message for `TestIamPermissions` method.
+    "permissions": [ # A subset of `TestPermissionsRequest.permissions` that the caller is
+        # allowed.
+      "A String",
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="unbindDeviceFromGateway">unbindDeviceFromGateway(parent, body, x__xgafv=None)</code>
+  <pre>Deletes the association between the device and the gateway.
+
+Args:
+  parent: string, The name of the registry. For example,
+`projects/example-project/locations/us-central1/registries/my-registry`. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request for `UnbindDeviceFromGateway`.
+    "gatewayId": "A String", # The value of `gateway_id` can be either the device numeric ID or the
+        # user-defined device identifier.
+    "deviceId": "A String", # The device to disassociate from the specified gateway. The value of
+        # `device_id` can be either the device numeric ID or the user-defined device
+        # identifier.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response for `UnbindDeviceFromGateway`.
+  }</pre>
+</div>
+
+</body></html>
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