code: function() { 
          var l = this.children.length;
          for (var i=0;i<l;++i) {
              var c = this.children[i];
              if (c.isDynamic()) {
                  break;
              } else if (! c.multiExpand) {
                  break;
              } else {
                  c.expand();
                  c.expandAll();
              }
          }
      }
docs: Recursively expands all of this node's children.
  @method expandAll