Method isExpandable

src/cdk/tree/tree.ts:1226–1228

()

   */
  @Input({transform: booleanAttribute})
  get isExpandable() {
    return this._isExpandable();
  }
  set isExpandable(isExpandable: boolean) {
    this._inputIsExpandable = isExpandable;
    if ((this.data && !this._isExpandable) || !this._inputIsExpandable) {