def METHOD_NAME(self, is_inside_record_or_union: bool):
    next_content = self._content.METHOD_NAME(is_inside_record_or_union)
    if next_content is None:
        return None
    else:
        return ListOffsetForm(
            self._offsets,
            next_content,
            parameters=self._parameters,
            form_key=self._form_key,
        )