code: def validate_unwrap(self, value):
          ''' Check that ``value`` is valid for unwrapping with ``ComputedField.computed_type``'''
          try:
              self.computed_type.validate_unwrap(value)
          except BadValueException as bve:
              self._fail_validation(value, 'Bad value for computed field', cause=bvef validate_unwrap(self, value):
          ''' Check that ``value`` is valid for unwrapping with ``ComputedField.computed_type``'''
          try:
              self.computed_type.validate_unwrap(value)
          except BadValueException as bve:
              self._fail_validation(value, 'Bad value for computed field', cause=bve)
docs: Check that ``value`` is valid for unwrapping with ``ComputedField.computed_type``