def _StubMethod(self, stub, method_descriptor,
                  rpc_controller, request, callback):
    """The body of all service methods in the generated stub class.

    Args:
      stub: Stub instance.
      method_descriptor: Descriptor of the invoked method.
      rpc_controller: Rpc controller to execute the method.
      request: Request protocol message.
      callback: A callback to execute when the method finishes.
    Returns:
      Response message (in case of blocking call).
    """
    return stub.rpc_channel.CallMethod(
        method_descriptor, rpc_controller, request,
        method_descriptor.output_type._concrete_class, callback)
The body of all service methods in the generated stub class.

    Args:
      stub: Stub instance.
      method_descriptor: Descriptor of the invoked method.
      rpc_controller: Rpc controller to execute the method.
      request: Request protocol message.
      callback: A callback to execute when the method finishes.
    Returns:
      Response message (in case of blocking call).
    
deps/protobuf/python/google/protobuf/service_reflection.py