docs: def _to_api_value(self, attribute_type, value):
          """Return a parsed value for the API."""
  
          if not value:
              return None
  
          if isinstance(attribute_type, properties.Instance):
              return value.to_api()
  
          if isinstance(attribute_type, properties.List):
              return self._parse_api_value_list(value)
  
          return attribute_type.serialize(value)