class_docstr: provide context to allow param_info to have different modifiers
code: def _rebuild_modifiers(self):
      self._modifiers = {}
      for m in self._modifiers_list:
          self._modifiers.update(m)
  
file_path: pytorch/caffe2/python/modifier_context.py
label_desc: Use image node_id 2 for calling the ModifierContext obj's underlying member method code with example usage: obj._rebuild_modifiers() without return types