Method getRecursiveData

src/cdk/tree/tree.spec.ts:1615–1619

(nodes: TestData[] = this._dataChange.getValue())

  }

  getRecursiveData(nodes: TestData[] = this._dataChange.getValue()): TestData[] {
    return [
      ...new Set(nodes.flatMap(parent => [parent, ...this.getRecursiveData(parent.children)])),
    ];
  }

  clear() {
    this.data = [];