code: function (node) {
          var children = this._children;
          var idx = children.indexOf(node);
          if (idx < 0) {
              return;
          }
  
          children.splice(idx, 1);
          node._parent = null;
  
          if (this._scene) {
              node.traverse(this._removeSelfFromScene, this);
          }
      }
docs: Remove the given child scene node
  @param {clay.Node} node