The renderer. Type:

public BookManager::getAllBooks() Returns

protected BookManager::buildBookOutlineData(array $links, array $parents

public BookManager::addFormElements(array $form, FormStateInterface $form_state

protected BookManager::recurseTableOfContents(array $tree, $indent, array

public BookManager::bookTreeAllData($bid, $link = NULL, $max_depth = NULL)

public BookManager::bookTreeCollectNodeLinks(&$tree, &$node_links)

Defines a book manager. Hierarchy class \Drupal\book\

public BookManager::checkNodeIsRemovable(NodeInterface $node)

protected BookManager::flatBookTree(array $tree, array &$flat)