public BookOutlineStorageInterface::hasBooks()
Checks if there are any books.
Return value
bool TRUE if there are books, FALSE if not.
File
- core/modules/book/src/BookOutlineStorageInterface.php, line 24
Class
- BookOutlineStorageInterface
- Defines a common interface for book outline storage classes.
Namespace
Drupal\book
Code
public function hasBooks();
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