code: function () {
          var children = this._children;
  
          for (var idx = 0; idx < children.length; idx++) {
              children[idx]._parent = null;
  
              if (this._scene) {
                  children[idx].traverse(this._removeSelfFromScene, this);
              }
          }
  
          this._children = [];
      }
docs: Remove all children