code: def process(self, message):
      if message is None:
          yield self.a._pyro_backward, None
      else:
          inv_axes = [None] * len(self.axes)
          for i, j in enumerate(self.axes):
              inv_axes[j] = i
          yield self.a._pyro_backward, message.permute(inv_axes)
  
imports: import weakref
  from abc import ABCMeta, abstractmethod
  import torch
  from pyro.ops import packed
  from pyro.util import jit_iter
label_desc: Use image node_id 2 for calling the _TransposeBackward obj's underlying member method code with example usage: obj.process(message) without return types