It is an angular select2 module for search data through ajax request.
@Input('prop') prop: string; // compulsory
@Input('url') url: string; // compulsory
@Input('cache') cache: boolean; // compulsory
@Output('changeValue') changeValue: EventEmitter <any> = new EventEmitter(); // compulsory
I show only compulsory filed here. Please go through the code you get more input fields.