Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+<h1><a href="servicebroker_v1beta1.html">Service Broker API</a> . <a href="servicebroker_v1beta1.projects.html">projects</a> . <a href="servicebroker_v1beta1.projects.brokers.html">brokers</a> . <a href="servicebroker_v1beta1.projects.brokers.instances.html">instances</a> . <a href="servicebroker_v1beta1.projects.brokers.instances.bindings.html">bindings</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#getLast_operation">getLast_operation(name, planId=None, serviceId=None, x__xgafv=None, operation=None)</a></code></p>
+<p class="firstline">Returns the state of the last operation for the binding.</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
+<p class="firstline">Lists all the bindings in the instance.</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>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="getLast_operation">getLast_operation(name, planId=None, serviceId=None, x__xgafv=None, operation=None)</code>
+  <pre>Returns the state of the last operation for the binding.
+Only last (or current) operation can be polled.
+
+Args:
+  name: string, Name must match
+`projects/[PROJECT_ID]/brokers/[BROKER_ID]/v2/service_instances/[INSTANCE_ID]/service_binding/[BINDING_ID]`. (required)
+  planId: string, Plan id.
+  serviceId: string, Service id.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  operation: string, If `operation` was returned during mutation operation, this field must be
+populated with the provided value.
+
+Returns:
+  An object of the form:
+
+    { # Describes a long running operation, which conforms to OpenService API.
+    "state": "A String", # The state of the operation.
+        # Valid values are: "in progress", "succeeded", and "failed".
+    "description": "A String", # Optional description of the Operation state.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</code>
+  <pre>Lists all the bindings in the instance.
+
+Args:
+  parent: string, Parent must match
+`projects/[PROJECT_ID]/brokers/[BROKER_ID]/` +
+`v2/service_instances/[INSTANCE_ID]`
+or
+`projects/[PROJECT_ID]/brokers/[BROKER_ID]/instances/[INSTANCE_ID]`. (required)
+  pageToken: string, Specifies a page token to use. Set `pageToken` to a `nextPageToken`
+returned by a previous list request to get the next page of results.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, Specifies the number of results to return per page. If there are fewer
+elements than the specified number, returns all elements.
+Optional. Acceptable values are 0 to 200, inclusive. (Default: 100)
+
+Returns:
+  An object of the form:
+
+    { # The response for the `ListBindings()` method.
+    "nextPageToken": "A String", # This token allows you to get the next page of results for list requests.
+        # If the number of results is larger than `pageSize`, use the `nextPageToken`
+        # as a value for the query parameter `pageToken` in the next list request.
+        # Subsequent list requests will have their own `nextPageToken` to continue
+        # paging through the results
+    "bindings": [ # The list of bindings in the instance.
+      { # Describes the binding.
+        "plan_id": "A String", # The ID of the plan. See `Service` and `Plan` resources for details.
+            # Maximum length is 64, GUID recommended.
+            # Required.
+        "parameters": { # Configuration options for the service binding.
+          "a_key": "", # Properties of the object.
+        },
+        "deploymentName": "A String", # Output only.
+            # String containing the Deployment Manager deployment name that was created
+            # for this binding,
+        "binding_id": "A String", # The id of the binding. Must be unique within GCP project.
+            # Maximum length is 64, GUID recommended.
+            # Required.
+        "resourceName": "A String", # Output only.
+            # The resource name of the binding, e.g.
+            # projects/project_id/brokers/broker_id/service_instances/instance_id/bindings/binding_id.
+        "bind_resource": { # A JSON object that contains data for platform resources associated with
+            # the binding to be created.
+          "a_key": "", # Properties of the object.
+        },
+        "createTime": "A String", # Output only.
+            # Timestamp for when the binding was created.
+        "service_id": "A String", # The id of the service. Must be a valid identifier of a service
+            # contained in the list from a `ListServices()` call.
+            # Maximum length is 64, GUID recommended.
+            # Required.
+      },
+    ],
+    "description": "A String", # Used to communicate description of the response. Usually for non-standard
+        # error codes.
+        # https://github.com/openservicebrokerapi/servicebroker/blob/master/spec.md#service-broker-errors
+  }</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>
+
+</body></html>
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