code: function () {
          var me = this,
              layouts = me.layoutQueue.clear(),
              length = layouts.length,
              i;
  
          ++me.cycleCount;
  
          // This value is incremented by ContextItem#setProp whenever new values are set
          // (thereby detecting forward progress):
          me.progressCount = 0;
  
          for (i = 0; i < length; ++i) {
              me.runLayout(me.currentLayout = layouts[i]);
          }
  
          me.currentLayout = null;
  
          return me.progressCount > 0;
      }
docs: Performs one layout cycle by calling each layout in the layout queue.
  @return {Boolean} True if some progress was made, false if not.
  @protected