app_installed_filter

Allow plugins to filter the result of app_installed.

Code excerpt:

                        $filter_arr = [
                                'uid'=>$uid,
                                'app'=>$app,
                                'installed'=>$r
                        ];
                        call_hooks('app_installed_filter',$filter_arr);
                        $r = $filter_arr['installed'];

cxref: Zotlabs/Lib/Apps.php