The book export service. Type:

public BookManager::checkNodeIsRemovable(NodeInterface $node)

public BookBreadcrumbBuilder::build(RouteMatchInterface

public BookManagerInterface::deleteFromBook($nid)

protected BookAdminEditForm::bookAdminTableTree(array $tree

Default theme implementation for a single node in a printer-friendly outline. Available variables:

public BookOutlineStorageInterface::loadMultiple($nids

public BookManager::getAllBooks() Returns

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

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