code: def __call__(self, op, noop_flag_buffer, tensor_lists, *args):
      self.check_avail()
  
      return op(self.chunk_size, noop_flag_buffer, tensor_lists, *args)
  
label_desc: Use image node_id 3 for calling the MultiTensorApply obj's underlying member method code with example usage: obj.__call__(op, noop_flag_buffer, tensor_lists) and returns: op