@classmethod
def create_default_subtopic_page(cls, subtopic_id, topic_id):
    'Creates a SubtopicPage object with default values.\n\n        Args:\n            subtopic_id: str. ID of the subtopic.\n            topic_id: str. The Id of the topic to which this page is linked\n                with.\n\n        Returns:\n            SubtopicPage. A subtopic object with given id, topic_id and default\n            page contents field.\n        '
    subtopic_page_id = cls.get_subtopic_page_id(topic_id, subtopic_id)
    return cls(subtopic_page_id, topic_id, SubtopicPageContents.create_default_subtopic_page_contents(), feconf.CURRENT_SUBTOPIC_PAGE_CONTENTS_SCHEMA_VERSION, constants.DEFAULT_LANGUAGE_CODE, 0)
Creates a SubtopicPage object with default values.

Args:
    subtopic_id: str. ID of the subtopic.
    topic_id: str. The Id of the topic to which this page is linked
        with.

Returns:
    SubtopicPage. A subtopic object with given id, topic_id and default
    page contents field.
@classmethod
def create_default_subtopic_page(cls, subtopic_id, topic_id):
    'Creates a SubtopicPage object with default values.\n\n        Args:\n            subtopic_id: str. ID of the subtopic.\n            topic_id: str. The Id of the topic to which this page is linked\n                with.\n\n        Returns:\n            SubtopicPage. A subtopic object with given id, topic_id and default\n            page contents field.\n        '
    subtopic_page_id = cls.get_subtopic_page_id(topic_id, subtopic_id)
    return cls(subtopic_page_id, topic_id, SubtopicPageContents.create_default_subtopic_page_contents(), feconf.CURRENT_SUBTOPIC_PAGE_CONTENTS_SCHEMA_VERSION, constants.DEFAULT_LANGUAGE_CODE, 0)