public BookNavigationCacheContext::

public BookOutlineStorageInterface::hasBooks()

public BookManagerInterface::addFormElements(array $form

public BookManager::bookSubtreeData($link) Gets

public BookManagerInterface::bookSubtreeData($link)

public BookManager::bookTreeGetFlat(array $book_link)

public BookManagerInterface::saveBookLink(array $link

public BookRemoveForm::buildForm(array $form, FormStateInterface

protected BookManager::loadBooks() Loads

protected BookManager::updateParent(array $link)