$mgr = $query->getModuleManager();
foreach ( $mgr->getNamesWithClasses() as $name => $class ) {
if ( is_subclass_of( $class, 'ApiQueryGeneratorBase' ) ) {
$mgr = $query->getModuleManager();
foreach ( $mgr->getNamesWithClasses() as $name => $class ) {
if ( is_subclass_of( $class, 'ApiQueryGeneratorBase' ) ) {