chore: regens API reference docs (#889)

diff --git a/docs/dyn/healthcare_v1beta1.projects.locations.datasets.operations.html b/docs/dyn/healthcare_v1beta1.projects.locations.datasets.operations.html
index 29969d2..15efd38 100644
--- a/docs/dyn/healthcare_v1beta1.projects.locations.datasets.operations.html
+++ b/docs/dyn/healthcare_v1beta1.projects.locations.datasets.operations.html
@@ -75,6 +75,9 @@
 <h1><a href="healthcare_v1beta1.html">Cloud Healthcare API</a> . <a href="healthcare_v1beta1.projects.html">projects</a> . <a href="healthcare_v1beta1.projects.locations.html">locations</a> . <a href="healthcare_v1beta1.projects.locations.datasets.html">datasets</a> . <a href="healthcare_v1beta1.projects.locations.datasets.operations.html">operations</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
+  <code><a href="#cancel">cancel(name, body=None, 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">
@@ -85,6 +88,47 @@
 <p class="firstline">Retrieves the next page of results.</p>
 <h3>Method Details</h3>
 <div class="method">
+    <code class="details" id="cancel">cancel(name, body=None, 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)
+  body: object, The request body.
+    The object takes the form of:
+
+{ # The request message for Operations.CancelOperation.
+  }
+
+  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
@@ -102,23 +146,11 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
-    "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.
-        },
-      ],
+    "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
@@ -136,11 +168,23 @@
     "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}`.
-    "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.
+    "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.
+        },
+      ],
     },
   }</pre>
 </div>
@@ -172,10 +216,31 @@
   An object of the form:
 
     { # The response message for Operations.ListOperations.
-    "nextPageToken": "A String", # The standard List next-page token.
     "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.
+        "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.
+        "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}`.
         "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
@@ -194,30 +259,9 @@
             },
           ],
         },
-        "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}`.
-        "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.
-        },
       },
     ],
+    "nextPageToken": "A String", # The standard List next-page token.
   }</pre>
 </div>