code: def _extra_repr(self):
      submods = []
      for i, submod in enumerate(self._submodules):
          submods.append(f"v{i}={submod}")
      return ", ".join(submods)
  
file_path: ivy/ivy/stateful/sequential.py
imports: from typing import Union, Optional
  import ivy
  from ivy.stateful.module import Module
label_desc: Use image node_id 4 for calling the Sequential obj's underlying member method code with example usage: obj._extra_repr() and returns: str