def __len__(self) -> int:
    if (self._is_none() or self._is_missing() or self._is_interpolation()):
        return 0
    content = self.__dict__['_content']
    return len(content)
def __len__(self) -> int:
    if (self._is_none() or self._is_missing() or self._is_interpolation()):
        return 0
    content = self.__dict__['_content']
    return len(content)