interface EntityBundleListenerInterface

interface EntityBundleListenerInterface {
    
    /**
     * Reacts to a bundle being created.
     *
     * @param string $bundle
     *   The name of the bundle created.
     * @param string $entity_type_id
     *   The entity type to which the bundle is bound; e.g. 'node' or 'user'.
     */
    public function onBundleCreate($bundle, $entity_type_id);
    
    /**
     * Reacts to a bundle being deleted.
     *
     * This method runs before fields are deleted.
     *
     * @param string $bundle
     *   The name of the bundle being deleted.
     * @param string $entity_type_id
     *   The entity type to which the bundle is bound; e.g. 'node' or 'user'.
     */
    public function onBundleDelete($bundle, $entity_type_id);

}