n adding support for new elements, expand this switch to trap
		 * cases where the precalculated value needs to change.
		 */
		switch ( $item->node_name ) {
			case 'BUTTON':
				$this->has_p_in_button_scope = $this->has_element_in_button_scope( 'P' );
				break;

			case 'P':
				$this->has_p_in_button_scope = $this->has_element_in_button_scope( 'P' );
				break;
		}
	}
}