code: def validate_properties(props, required):
      
  
      props = set(props)
      required = set(required or _supported_props)
  
      if len(required.intersection(props)) < len(required):
          missing = required - props
          raise ValidationError(
              'Missing property names: {props}', props=','.join(missing), missing=missing
          )
docs: Ensures the key set contains the base supported properties for a Parser
      :param props: a set of property names to validate against those supported