Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="safebrowsing_v4.html">Safe Browsing API</a> . <a href="safebrowsing_v4.threatHits.html">threatHits</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">Reports a Safe Browsing threat list hit to Google. Only projects with</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="create">create(body, x__xgafv=None)</code>
+  <pre>Reports a Safe Browsing threat list hit to Google. Only projects with
+TRUSTED_REPORTER visibility can use this method.
+
+Args:
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{
+    "threatType": "A String", # The threat type reported.
+    "clientInfo": { # The client metadata associated with Safe Browsing API requests. # Client-reported identification.
+      "clientVersion": "A String", # The version of the client implementation.
+      "clientId": "A String", # A client ID that (hopefully) uniquely identifies the client implementation
+          # of the Safe Browsing API.
+    },
+    "userInfo": { # Details about the user that encountered the threat. # Details about the user that encountered the threat.
+      "regionCode": "A String", # The UN M.49 region code associated with the user's location.
+      "userId": "A String", # Unique user identifier defined by the client.
+    },
+    "entry": { # An individual threat; for example, a malicious URL or its hash # The threat entry responsible for the hit. Full hash should be reported for
+        # hash-based hits.
+        # representation. Only one of these fields should be set.
+      "url": "A String", # A URL.
+      "hash": "A String", # A hash prefix, consisting of the most significant 4-32 bytes of a SHA256
+          # hash. This field is in binary format. For JSON requests, hashes are
+          # base64-encoded.
+      "digest": "A String", # The digest of an executable in SHA256 format. The API supports both
+          # binary and hex digests. For JSON requests, digests are base64-encoded.
+    },
+    "platformType": "A String", # The platform type reported.
+    "resources": [ # The resources related to the threat hit.
+      { # A single resource related to a threat hit.
+        "url": "A String", # The URL of the resource.
+        "referrer": "A String", # Referrer of the resource. Only set if the referrer is available.
+        "type": "A String", # The type of source reported.
+        "remoteIp": "A String", # The remote IP of the resource in ASCII format. Either IPv4 or IPv6.
+      },
+    ],
+  }
+
+  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>
+
+</body></html>
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