package com.gueei.demos.markupDemo.viewModels; import gueei.binding.Command; import gueei.binding.observables.StringObservable; import android.view.View; public class CustomView { public StringObservable Mask = new StringObservable("*"); public Command Clear = new Command(){ public void Invoke(View view, Object... args) { Mask.set(""); } }; }