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25 …(../reference/apis-arkui/js-apis-arkui-builderNode.md#getframenode)获取到一个指向根节点的FrameNode对象，否则返回null。
81   private textNode: BuilderNode<[Params]> | null = null;
89   makeNode(context: UIContext): FrameNode | null {
143   private rootNode: FrameNode | null = null;
144   private textNode: BuilderNode<[Params]> | null = null;
152   makeNode(context: UIContext): FrameNode | null {
161     if (rootRenderNode !== null) {
245   private textNode: BuilderNode<[Params]> | null = null;
253   makeNode(context: UIContext): FrameNode | null {
260     if (this.textNode !== null) {
340   private rootNode: BuilderNode<[Params]> | null = null;
343   makeNode(uiContext: UIContext): FrameNode | null {
350     if (this.rootNode == null) {
391   private listener: DataChangeListener | null = null
414     this.listener = null;
432   public builderNode: BuilderNode<[Params]> | null = null;
435   makeNode(uiContext: UIContext): FrameNode | null {
436     if (this.builderNode == null) {
572   private textNode: BuilderNode<[Params]> | null = null;
580   makeNode(context: UIContext): FrameNode | null {
581     return this.textNode?.getFrameNode() ? this.textNode?.getFrameNode() : null;
596     if (this.textNode !== null) {
697   private rootNode: FrameNode | null = null;
698   private textNode: BuilderNode<[]> | null = null;
700   makeNode(context: UIContext): FrameNode | null {
814   private rootNode: FrameNode | null = null;
815   private textNode: BuilderNode<[]> | null = null;
817   makeNode(context: UIContext): FrameNode | null {