code: def to_json(self):
      serialized_dict = self.to_dict()
      for key, val in serialized_dict.items():
          if isinstance(val, pathlib.Path):
              serialized_dict[key] = str(val)
      return json.dumps(serialized_dict, indent=2)
  
imports: import argparse
  import attr
  import copy
  import inspect
  import json
  import shlex
  import sys
  import pathlib
  from typing import Any, Tuple
  from jiant.utils.python.io import read_json
  from jiant.utils.python.datastructures import combine_dicts
label_desc: Use image node_id 14 for calling the RunConfig obj's underlying member method code with example usage: obj.to_json() and returns: json