returns Jet App instance of the widget
const fm = webix.ui({
view:"filemanager", url:"some/records/"
});
//accessing Jet App service
const state = fm.$app.getService("local");
The property points to the instance of the Jet App class initialized within a Webix Jet-based widget: Chat, File Manager, Document Manager, User Manager, Query, Scheduler, Gantt, Report Manager, Diagram Editor, and Pivot