code: def get_graphs(self, run_key, debug=False):
      
      graph_dict = (self._run_key_to_debug_graphs if debug else
                    self._run_key_to_original_graphs)
      graph_wrappers = graph_dict.get(run_key, {})
      graph_defs = dict()
      for device_name, wrapper in graph_wrappers.items():
        graph_defs[device_name] = wrapper.graph_def
      return graph_defs
docs: Get the runtime GraphDef protos associated with a run key.
  
      Args:
        run_key: A Session.run kay.
        debug: Whether the debugger-decoratedgraph is to be retrieved.
  
      Returns:
        A `dict` mapping device name to `GraphDef` protos.