message: fix: Storage needs childrenRef in RichText
diff: @@ -198,6 +198,10 @@ class RichText extends Element<RichTextOption> {
  this.attr(opts);
  }
  + childrenRef() {
  + return this._children;
  + }
  +
  traverse<Context>(
  cb: (this: Context, el: RichText) => void,
  context: Context
  @@ -278,10 +282,6 @@ class RichText extends Element<RichTextOption> {
  this.dirty();
  }
  - children() {
  - return this._children;
  - }
  -
  getBoundingRect(): BoundingRect {
  if (!this._rect) {
  const tmpRect = new BoundingRect(0, 0, 0, 0);
  