public void getIamPolicy(
        com.google.iam.v1.GetIamPolicyRequest request,
        io.grpc.stub.StreamObserver<com.google.iam.v1.Policy> responseObserver) {
      io.grpc.stub.ClientCalls.asyncUnaryCall(
          getChannel().newCall(getGetIamPolicyMethod(), getCallOptions()),
          request,
          responseObserver);
    }
<pre>
Gets the access control policy for a
[Queue][google.cloud.tasks.v2beta3.Queue]. Returns an empty policy if the
resource exists and does not have a policy set.
Authorization requires the following
[Google IAM](https://cloud.google.com/iam) permission on the specified
resource parent:
* `cloudtasks.queues.getIamPolicy`
</pre>
java-tasks/grpc-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/CloudTasksGrpc.java