code: def __str__(self):
      return json.dumps(self.config)
  
imports: import os, sys, json, re
  import tempfile
  import copy
  import inspect
  import logging
  import importlib
  from .None import solver
  from .None import patterns
label_desc: Use image node_id 5 for calling the Config obj's underlying member method code with example usage: obj.__str__() and returns: json