Allow ParentButton Icon to be Widget

[suesitran]

I wanna create different widget to be used as ParentButton, but it's only limited to Icon. Please allow Widget in this field

[ra-develop]

@suesitran I am agree. It is good idea. Why I can use widget for ChildButton, but can not use widget in ParentButton and finalButtonIcon?

@tiagojencmartins Please allow Widget in these both field: ParentButton and finalButtonIcon

      floatingActionButton: UnicornDialer(
          backgroundColor: Colors.white,
          parentButtonBackground: Colors.white,
          orientation: UnicornOrientation.VERTICAL,
          parentButton: ImageIcon(AssetImage("images/btn_new.png")), // Not working
//          Icon(Icons.more_vert), // Working
          childButtons: childButtons)

Error:
error: The argument type 'ImageIcon' can't be assigned to the parameter type 'Icon'. (argument_type_not_assignable at [fluttermodule] lib/view/HomePage.dart:191)