dart - Polymer 1.0 - how to set icon position programmatically -

using polymer 1.0 , dart, have:

  paperbutton paperbuttonforget = new paperbutton();   ironicon iconclear = new ironicon();   paperbuttonforget.innerhtml = "forget";   paperbuttonforget.children.add(iconclear);   paperbuttonforget.raised=true; 

the button produced shows "forget x"

i have 2 questions:

1) how can make show "x forget" in https://elements.polymer-project.org/elements/paper-button?view=demo:demo/index.html&active=paper-button

2) paperbuttonforget.raised=true; "doesn't work" - maybe need else...?

cheers steve

this way icon left , button shown raised:

import 'dart:html' dom; import 'package:polymer/polymer.dart'; import 'app_element.dart'; import 'package:polymer_elements/paper_button.dart'; import 'package:polymer_elements/iron_icon.dart'; import 'package:polymer_elements/communication_icons.dart';  /// [appelement] main() async {   await initpolymer();   paperbutton paperbuttonforget = new paperbutton();   ironicon iconclear = new ironicon()..icon = 'communication:email';   paperbuttonforget.append(iconclear);   paperbuttonforget.append(new dom.text("forget"));   paperbuttonforget.attributes['raised']='true';   dom.document.body.append(paperbuttonforget); }