chore: regens API reference docs (#889)

diff --git a/docs/dyn/dialogflow_v2.projects.operations.html b/docs/dyn/dialogflow_v2.projects.operations.html
index cd8fee1..4b4fc6f 100644
--- a/docs/dyn/dialogflow_v2.projects.operations.html
+++ b/docs/dyn/dialogflow_v2.projects.operations.html
@@ -75,10 +75,54 @@
 <h1><a href="dialogflow_v2.html">Dialogflow API</a> . <a href="dialogflow_v2.projects.html">projects</a> . <a href="dialogflow_v2.projects.operations.html">operations</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
+  <code><a href="#cancel">cancel(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Starts asynchronous cancellation on a long-running operation.  The server</p>
+<p class="toc_element">
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets the latest state of a long-running operation.  Clients can use this</p>
+<p class="toc_element">
+  <code><a href="#list">list(name, pageToken=None, x__xgafv=None, pageSize=None, filter=None)</a></code></p>
+<p class="firstline">Lists operations that match the specified filter in the request. If the</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="cancel">cancel(name, x__xgafv=None)</code>
+  <pre>Starts asynchronous cancellation on a long-running operation.  The server
+makes a best effort to cancel the operation, but success is not
+guaranteed.  If the server doesn't support this method, it returns
+`google.rpc.Code.UNIMPLEMENTED`.  Clients can use
+Operations.GetOperation or
+other methods to check whether the cancellation succeeded or whether the
+operation completed despite cancellation. On successful cancellation,
+the operation is not deleted; instead, it becomes an operation with
+an Operation.error value with a google.rpc.Status.code of 1,
+corresponding to `Code.CANCELLED`.
+
+Args:
+  name: string, The name of the operation resource to be cancelled. (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 the latest state of a long-running operation.  Clients can use this
 method to poll the operation result at intervals as recommended by the API
@@ -96,12 +140,28 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
     "metadata": { # Service-specific metadata associated with the operation.  It typically
         # contains progress information and common metadata such as create time.
         # Some services might not provide such metadata.  Any method that returns a
         # long-running operation should document the metadata type, if any.
       "a_key": "", # Properties of the object. Contains field @type with type URL.
     },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
     "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
         # different programming environments, including REST APIs and RPC APIs. It is
         # used by [gRPC](https://github.com/grpc). Each `Status` message contains
@@ -120,23 +180,97 @@
         },
       ],
     },
-    "done": True or False, # If the value is `false`, it means the operation is still in progress.
-        # If `true`, the operation is completed, and either `error` or `response` is
-        # available.
-    "response": { # The normal response of the operation in case of success.  If the original
-        # method returns no data on success, such as `Delete`, the response is
-        # `google.protobuf.Empty`.  If the original method is standard
-        # `Get`/`Create`/`Update`, the response should be the resource.  For other
-        # methods, the response should have the type `XxxResponse`, where `Xxx`
-        # is the original method name.  For example, if the original method name
-        # is `TakeSnapshot()`, the inferred response type is
-        # `TakeSnapshotResponse`.
-      "a_key": "", # Properties of the object. Contains field @type with type URL.
-    },
-    "name": "A String", # The server-assigned name, which is only unique within the same service that
-        # originally returns it. If you use the default HTTP mapping, the
-        # `name` should be a resource name ending with `operations/{unique_id}`.
   }</pre>
 </div>
 
+<div class="method">
+    <code class="details" id="list">list(name, pageToken=None, x__xgafv=None, pageSize=None, filter=None)</code>
+  <pre>Lists operations that match the specified filter in the request. If the
+server doesn't support this method, it returns `UNIMPLEMENTED`.
+
+NOTE: the `name` binding allows API services to override the binding
+to use different resource name schemes, such as `users/*/operations`. To
+override the binding, API services can add a binding such as
+`"/v1/{name=users/*}/operations"` to their service configuration.
+For backwards compatibility, the default name includes the operations
+collection id, however overriding users must ensure the name binding
+is the parent resource, without the operations collection id.
+
+Args:
+  name: string, The name of the operation's parent resource. (required)
+  pageToken: string, The standard list page token.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, The standard list page size.
+  filter: string, The standard list filter.
+
+Returns:
+  An object of the form:
+
+    { # The response message for Operations.ListOperations.
+    "operations": [ # A list of operations that matches the specified filter in the request.
+      { # This resource represents a long-running operation that is the result of a
+          # network API call.
+        "response": { # The normal response of the operation in case of success.  If the original
+            # method returns no data on success, such as `Delete`, the response is
+            # `google.protobuf.Empty`.  If the original method is standard
+            # `Get`/`Create`/`Update`, the response should be the resource.  For other
+            # methods, the response should have the type `XxxResponse`, where `Xxx`
+            # is the original method name.  For example, if the original method name
+            # is `TakeSnapshot()`, the inferred response type is
+            # `TakeSnapshotResponse`.
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+        "metadata": { # Service-specific metadata associated with the operation.  It typically
+            # contains progress information and common metadata such as create time.
+            # Some services might not provide such metadata.  Any method that returns a
+            # long-running operation should document the metadata type, if any.
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+        "done": True or False, # If the value is `false`, it means the operation is still in progress.
+            # If `true`, the operation is completed, and either `error` or `response` is
+            # available.
+        "name": "A String", # The server-assigned name, which is only unique within the same service that
+            # originally returns it. If you use the default HTTP mapping, the
+            # `name` should be a resource name ending with `operations/{unique_id}`.
+        "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+            # different programming environments, including REST APIs and RPC APIs. It is
+            # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+            # three pieces of data: error code, error message, and error details.
+            #
+            # You can find out more about this error model and how to work with it in the
+            # [API Design Guide](https://cloud.google.com/apis/design/errors).
+          "message": "A String", # A developer-facing error message, which should be in English. Any
+              # user-facing error message should be localized and sent in the
+              # google.rpc.Status.details field, or localized by the client.
+          "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+          "details": [ # A list of messages that carry the error details.  There is a common set of
+              # message types for APIs to use.
+            {
+              "a_key": "", # Properties of the object. Contains field @type with type URL.
+            },
+          ],
+        },
+      },
+    ],
+    "nextPageToken": "A String", # The standard List next-page token.
+  }</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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