toEntity method

Implementation

Topic toEntity() {
  return Topic(
    id: id,
    bookId: bookId,
    domainId: domainId,
    parentTopicId: parentTopicId,
    title: title,
    depth: depth,
    sortOrder: sortOrder,
    pageStart: pageStart,
    pageEnd: pageEnd,
    curriculumLevelId: curriculumLevelId,
    children: children.map((c) => c.toEntity()).toList(),
  );
}