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.debug.html">debug</a> . <a href="cloudsearch_v1.debug.datasources.html">datasources</a> . <a href="cloudsearch_v1.debug.datasources.items.html">items</a> . <a href="cloudsearch_v1.debug.datasources.items.unmappedids.html">unmappedids</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#list">list(parent, pageSize=None, debugOptions_enableDebugging=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">List all unmapped identities for a specific item.</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="list">list(parent, pageSize=None, debugOptions_enableDebugging=None, pageToken=None, x__xgafv=None)</code>
+  <pre>List all unmapped identities for a specific item.
+
+Args:
+  parent: string, The name of the item, in the following format:
+datasources/{source_id}/items/{ID} (required)
+  pageSize: integer, Maximum number of items to fetch in a request.
+Defaults to 100.
+  debugOptions_enableDebugging: boolean, If you are asked by Google to help with debugging, set this field.
+Otherwise, ignore this field.
+  pageToken: string, The next_page_token value returned from a previous List request, if any.
+  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.
+    "unmappedIdentities": [
+      {
+        "externalIdentity": { # Reference to a user, group, or domain. # The resource name for an external user.
+          "userResourceName": "A String", # This principal is a user identified using an external identity.
+              # The name field must specify the user resource name with this format:
+              # identitysources/{source_id}/users/{ID}
+          "groupResourceName": "A String", # This principal is a group identified using an external identity.
+              # The name field must specify the group resource name with this format:
+              # identitysources/{source_id}/groups/{ID}
+          "gsuitePrincipal": { # This principal is a GSuite user, group or domain.
+            "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
+          },
+        },
+        "resolutionStatusCode": "A String", # The resolution status for the external identity.
+      },
+    ],
+  }</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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