code: def validate(self, name: str, obj):
      if not obj:
          raise ValidationError(f"{name} cannot be {obj}")
  
imports: from typing import Union, Dict, Pattern, Callable, Any, List, Optional
  import re
  import logging
label_desc: Use image node_id 1 for calling the TruthyValidator obj's underlying member method code with example usage: obj.validate(name, obj) without return types