code: def _refresh_grpc(operations_stub, operation_name):
      
      request_pb = operations_pb2.GetOperationRequest(name=operation_name)
      return operations_stub.GetOperation(request_pb)
docs: Refresh an operation using a gRPC client.
  
      Args:
          operations_stub (google.longrunning.operations_pb2.OperationsStub):
              The gRPC operations stub.
          operation_name (str): The name of the operation.
  
      Returns:
          google.longrunning.operations_pb2.Operation: The operation.