code: function (node) {
          if (node instanceof Camera) {
              if (this._cameraList.length > 0) {
                  console.warn('Found multiple camera in one scene. Use the fist one.');
              }
              this._cameraList.push(node);
          }
          else if (node instanceof Light) {
              this.lights.push(node);
          }
          if (node.name) {
              this._nodeRepository[node.name] = node;
          }
      }
docs: Add node to scene