class_docstr: Abstract class for Replay Buffer.
  
  Args:
      env_spec (EnvSpec): Environment specification.
      size_in_transitions (int): total size of transitions in the buffer
      time_horizon (int): time horizon of epsiode.
docstr: Return the size of the replay buffer.
  
  Returns:
      int: Size of the current replay buffer.
docstr_tok: ["Return","the","size","of","the","replay","buffer",".","Returns",":","int",":","Size","of","the","current","replay","buffer","."]
code: def n_transitions_stored(self):
      """Return the size of the replay buffer.
  
      Returns:
          int: Size of the current replay buffer.
  
      """
      return self._n_transitions_stored
  
file_path: garage/src/garage/replay_buffer/replay_buffer.py
imports: import abc
  from abc import abstractmethod
  import numpy
label_desc: Use image node_id 10 for calling the ReplayBuffer obj's underlying member method code with example usage: obj.n_transitions_stored() and returns: self