Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="container_v1beta1.html">Kubernetes Engine API</a> . <a href="container_v1beta1.projects.html">projects</a> . <a href="container_v1beta1.projects.zones.html">zones</a> . <a href="container_v1beta1.projects.zones.operations.html">operations</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#cancel">cancel(projectId, zone, operationId, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Cancels the specified operation.</p>
+<p class="toc_element">
+  <code><a href="#get">get(projectId, zone, operationId, name=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets the specified operation.</p>
+<p class="toc_element">
+  <code><a href="#list">list(projectId, zone, parent=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists all operations in a project in the specified zone or all zones.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="cancel">cancel(projectId, zone, operationId, body, x__xgafv=None)</code>
+  <pre>Cancels the specified operation.
+
+Args:
+  projectId: string, Deprecated. The Google Developers Console [project ID or project
+number](https://support.google.com/cloud/answer/6158840).
+This field has been deprecated and replaced by the name field. (required)
+  zone: string, Deprecated. The name of the Google Compute Engine
+[zone](/compute/docs/zones#available) in which the operation resides.
+This field has been deprecated and replaced by the name field. (required)
+  operationId: string, Deprecated. The server-assigned `name` of the operation.
+This field has been deprecated and replaced by the name field. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # CancelOperationRequest cancels a single operation.
+    "projectId": "A String", # Deprecated. The Google Developers Console [project ID or project
+        # number](https://support.google.com/cloud/answer/6158840).
+        # This field has been deprecated and replaced by the name field.
+    "name": "A String", # The name (project, location, operation id) of the operation to cancel.
+        # Specified in the format 'projects/*/locations/*/operations/*'.
+    "zone": "A String", # Deprecated. The name of the Google Compute Engine
+        # [zone](/compute/docs/zones#available) in which the operation resides.
+        # This field has been deprecated and replaced by the name field.
+    "operationId": "A String", # Deprecated. The server-assigned `name` of the operation.
+        # This field has been deprecated and replaced by the name field.
+  }
+
+  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(projectId, zone, operationId, name=None, x__xgafv=None)</code>
+  <pre>Gets the specified operation.
+
+Args:
+  projectId: string, Deprecated. The Google Developers Console [project ID or project
+number](https://support.google.com/cloud/answer/6158840).
+This field has been deprecated and replaced by the name field. (required)
+  zone: string, Deprecated. The name of the Google Compute Engine
+[zone](/compute/docs/zones#available) in which the cluster
+resides.
+This field has been deprecated and replaced by the name field. (required)
+  operationId: string, Deprecated. The server-assigned `name` of the operation.
+This field has been deprecated and replaced by the name field. (required)
+  name: string, The name (project, location, operation id) of the operation to get.
+Specified in the format 'projects/*/locations/*/operations/*'.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This operation resource represents operations that may have happened or are
+      # happening on the cluster. All fields are output only.
+    "status": "A String", # The current status of the operation.
+    "endTime": "A String", # [Output only] The time the operation completed, in
+        # [RFC3339](https://www.ietf.org/rfc/rfc3339.txt) text format.
+    "name": "A String", # The server-assigned ID for the operation.
+    "zone": "A String", # The name of the Google Compute Engine
+        # [zone](/compute/docs/zones#available) in which the operation
+        # is taking place.
+        # This field is deprecated, use location instead.
+    "location": "A String", # [Output only] The name of the Google Compute Engine
+        # [zone](/compute/docs/regions-zones/regions-zones#available) or
+        # [region](/compute/docs/regions-zones/regions-zones#available) in which
+        # the cluster resides.
+    "startTime": "A String", # [Output only] The time the operation started, in
+        # [RFC3339](https://www.ietf.org/rfc/rfc3339.txt) text format.
+    "detail": "A String", # Detailed operation progress, if available.
+    "clusterConditions": [ # Which conditions caused the current cluster state.
+      { # StatusCondition describes why a cluster or a node pool has a certain status
+          # (e.g., ERROR or DEGRADED).
+        "message": "A String", # Human-friendly representation of the condition
+        "code": "A String", # Machine-friendly representation of the condition
+      },
+    ],
+    "statusMessage": "A String", # If an error has occurred, a textual description of the error.
+    "operationType": "A String", # The operation type.
+    "progress": { # Information about operation (or operation stage) progress. # [Output only] Progress information for an operation.
+      "status": "A String", # Status of an operation stage.
+          # Unset for single-stage operations.
+      "metrics": [ # Progress metric bundle, for example:
+          #   metrics: [{name: "nodes done",     int_value: 15},
+          #             {name: "nodes total",    int_value: 32}]
+          # or
+          #   metrics: [{name: "progress",       double_value: 0.56},
+          #             {name: "progress scale", double_value: 1.0}]
+        { # Progress metric is (string, int|float|string) pair.
+          "stringValue": "A String", # For metrics with custom values (ratios, visual progress, etc.).
+          "intValue": "A String", # For metrics with integer value.
+          "name": "A String", # Metric name, required.
+              # e.g., "nodes total", "percent done"
+          "doubleValue": 3.14, # For metrics with floating point value.
+        },
+      ],
+      "stages": [ # Substages of an operation or a stage.
+        # Object with schema name: OperationProgress
+      ],
+      "name": "A String", # A non-parameterized string describing an operation stage.
+          # Unset for single-stage operations.
+    },
+    "nodepoolConditions": [ # Which conditions caused the current node pool state.
+      { # StatusCondition describes why a cluster or a node pool has a certain status
+          # (e.g., ERROR or DEGRADED).
+        "message": "A String", # Human-friendly representation of the condition
+        "code": "A String", # Machine-friendly representation of the condition
+      },
+    ],
+    "selfLink": "A String", # Server-defined URL for the resource.
+    "targetLink": "A String", # Server-defined URL for the target of the operation.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(projectId, zone, parent=None, x__xgafv=None)</code>
+  <pre>Lists all operations in a project in the specified zone or all zones.
+
+Args:
+  projectId: string, Deprecated. The Google Developers Console [project ID or project
+number](https://support.google.com/cloud/answer/6158840).
+This field has been deprecated and replaced by the parent field. (required)
+  zone: string, Deprecated. The name of the Google Compute Engine
+[zone](/compute/docs/zones#available) to return operations for, or `-` for
+all zones. This field has been deprecated and replaced by the parent field. (required)
+  parent: string, The parent (project and location) where the operations will be listed.
+Specified in the format 'projects/*/locations/*'.
+Location "-" matches all zones and all regions.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # ListOperationsResponse is the result of ListOperationsRequest.
+    "operations": [ # A list of operations in the project in the specified zone.
+      { # This operation resource represents operations that may have happened or are
+          # happening on the cluster. All fields are output only.
+        "status": "A String", # The current status of the operation.
+        "endTime": "A String", # [Output only] The time the operation completed, in
+            # [RFC3339](https://www.ietf.org/rfc/rfc3339.txt) text format.
+        "name": "A String", # The server-assigned ID for the operation.
+        "zone": "A String", # The name of the Google Compute Engine
+            # [zone](/compute/docs/zones#available) in which the operation
+            # is taking place.
+            # This field is deprecated, use location instead.
+        "location": "A String", # [Output only] The name of the Google Compute Engine
+            # [zone](/compute/docs/regions-zones/regions-zones#available) or
+            # [region](/compute/docs/regions-zones/regions-zones#available) in which
+            # the cluster resides.
+        "startTime": "A String", # [Output only] The time the operation started, in
+            # [RFC3339](https://www.ietf.org/rfc/rfc3339.txt) text format.
+        "detail": "A String", # Detailed operation progress, if available.
+        "clusterConditions": [ # Which conditions caused the current cluster state.
+          { # StatusCondition describes why a cluster or a node pool has a certain status
+              # (e.g., ERROR or DEGRADED).
+            "message": "A String", # Human-friendly representation of the condition
+            "code": "A String", # Machine-friendly representation of the condition
+          },
+        ],
+        "statusMessage": "A String", # If an error has occurred, a textual description of the error.
+        "operationType": "A String", # The operation type.
+        "progress": { # Information about operation (or operation stage) progress. # [Output only] Progress information for an operation.
+          "status": "A String", # Status of an operation stage.
+              # Unset for single-stage operations.
+          "metrics": [ # Progress metric bundle, for example:
+              #   metrics: [{name: "nodes done",     int_value: 15},
+              #             {name: "nodes total",    int_value: 32}]
+              # or
+              #   metrics: [{name: "progress",       double_value: 0.56},
+              #             {name: "progress scale", double_value: 1.0}]
+            { # Progress metric is (string, int|float|string) pair.
+              "stringValue": "A String", # For metrics with custom values (ratios, visual progress, etc.).
+              "intValue": "A String", # For metrics with integer value.
+              "name": "A String", # Metric name, required.
+                  # e.g., "nodes total", "percent done"
+              "doubleValue": 3.14, # For metrics with floating point value.
+            },
+          ],
+          "stages": [ # Substages of an operation or a stage.
+            # Object with schema name: OperationProgress
+          ],
+          "name": "A String", # A non-parameterized string describing an operation stage.
+              # Unset for single-stage operations.
+        },
+        "nodepoolConditions": [ # Which conditions caused the current node pool state.
+          { # StatusCondition describes why a cluster or a node pool has a certain status
+              # (e.g., ERROR or DEGRADED).
+            "message": "A String", # Human-friendly representation of the condition
+            "code": "A String", # Machine-friendly representation of the condition
+          },
+        ],
+        "selfLink": "A String", # Server-defined URL for the resource.
+        "targetLink": "A String", # Server-defined URL for the target of the operation.
+      },
+    ],
+    "missingZones": [ # If any zones are listed here, the list of operations returned
+        # may be missing the operations from those zones.
+      "A String",
+    ],
+  }</pre>
+</div>
+
+</body></html>
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