Method node

packages/shell/src/model/selection.ts:27–30

* return selected Node instance

()

   * return selected Node instance
   */
  get node(): IPublicModelNode | null {
    const nodes = this.getNodes();
    return nodes && nodes.length > 0 ? nodes[0] : null;
  }

  /**
   * 选中指定节点（覆盖方式）