code: def memory_size(self):
      return min(self.accu_memory_num, self.max_replay_memory_size)
  
imports: import logging
  from collections import deque
  from typing import NamedTuple
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from reagent.core import types
  from reagent.core.torch_utils import stack
  from torch.distributions.normal import Normal
label_desc: Use image node_id 5 for calling the MDNRNNMemoryPool obj's underlying member method code with example usage: obj.memory_size() and returns: min