code: def __str__(self):
      if self.message:
          return f"FairnessObject difference error has been raised, {self.message}"
      else:
          return "FairnessObject difference error has been raised"
  
file_path: DALEX/python/dalex/dalex/fairness/_basics/exceptions.py
label_desc: Use image node_id 2 for calling the FairnessObjectsDifferenceError obj's underlying member method code with example usage: obj.__str__() and returns: str, self, str