wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php:1030Gets the id of the menu that the given menu item belongs to.
int protected function get_menu_id( $menu_item_id ) { $menu_ids = wp_get_post_terms( $menu_item_id, 'nav_menu', array( 'fields' => 'ids' ) ); $menu_id = 0; if ( $menu_ids && ! is_wp_error( $menu_ids ) ) { $menu_id = array_shift( $menu_ids ); } return $menu_id; }Introduced in 5.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.