code: function() {
              if (!this.parent) {
                  Kinetic.Util.warn('Node has no parent. moveToTop function is ignored.');
                  return;
              }
              var index = this.index;
              this.parent.children.splice(index, 1);
              this.parent.children.push(this);
              this.parent._setChildrenIndices();
              return true;
          }
docs: move node to the top of its siblings
  @method
  @memberof Kinetic.Node.prototype
  @returns {Boolean}