code: def __getattr__(self, attr: str):
      ret = []
      for transition in self.transitions:
          ret.append(getattr(transition, attr))
      return ret
  
imports: from abc import ABC, abstractmethod
  from dataclasses import asdict, dataclass, field, fields
  from typing import Any, Callable, Dict, List, Optional, Union
  import numpy
  import reagent.core.types
  import torch
  import torch.nn.functional
label_desc: Use image node_id 4 for calling the Trajectory obj's underlying member method code with example usage: obj.__getattr__(attr) and returns: ret