static public InputAtom_IntStick GetAsIntStick(this InputAtom_Stick item, float threshold = AxisSlider.Threshold)
 {
     return(item.IfNotNull(i => new InputAtom_IntStick_Stick(i, threshold)));
 }
 static public InputAtom_Axis GetAsAxis(this InputAtom_Stick item, bool is_horizontal)
 {
     return(item.IfNotNull(i => new InputAtom_Axis_StickHalf(i, is_horizontal)));
 }