def _construct_operation_id(self, service_name, protorpc_method_name):
    """Return an operation id for a service method.

    Args:
      service_name: The name of the service.
      protorpc_method_name: The ProtoRPC method name.

    Returns:
      A string representing the operation id.
    """

    # camelCase the ProtoRPC method name
    method_name_camel = util.snake_case_to_headless_camel_case(
        protorpc_method_name)

    return '{0}_{1}'.format(service_name, method_name_camel)
Return an operation id for a service method.

    Args:
      service_name: The name of the service.
      protorpc_method_name: The ProtoRPC method name.

    Returns:
      A string representing the operation id.