docstr: float: Max capacity of the buffer
docstr_tok: ["float",":","Max","capacity","of","the","buffer"]
code: def buffer_size(self) -> int:
      """float: Max capacity of the buffer"""
      return self._maxsize
  
imports: import random
  from typing import Optional, List, Union
  import numpy
  from stable_baselines.common.segment_tree import SumSegmentTree, MinSegmentTree
  from stable_baselines.common.vec_env import VecNormalize
label_desc: Use image node_id 4 for calling the ReplayBuffer obj's underlying member method code with example usage: obj.buffer_size() and returns: self