function scrollToIndex(index) {
    ironList.scrollToIndex(index);
    container.dispatchEvent(new CustomEvent('scroll'));
    Polymer.dom.flush();
  }
// so instead scroll ironList and send a 'scroll' event to the container.
so instead scroll ironList and send a 'scroll' event to the container.
so instead scroll ironList and send a ' scroll ' event to the container .
function scrollToIndex(index) {
    ironList.scrollToIndex(index);
    container.dispatchEvent(new CustomEvent('scroll'));
    Polymer.dom.flush();
  }
function scrollToIndex ( index ) { ironList . scrollToIndex ( index ) ; container . dispatchEvent ( new CustomEvent ( 'scroll' ) ) ; Polymer . dom . flush ( ) ; }
so instead scroll ironList and send a 'scroll' event to the container.
so instead scroll ironList and send a ' scroll ' event to the container .