The book being displayed. Type:

public BookAdminEditForm::__construct(EntityStorageInterface

public BookRemoveForm::__construct(BookManagerInterface $boo

public BookOutlineForm::__construct(EntityManagerInterface

protected BookSettingsForm::getEditableConfigNames()

public BookOutlineForm::save(array $form, FormStateInterface

Remove form for book module. Hierarchy class \Drupal\Core\Form\

BookManager service. Type: