Method constructor

src/cdk/tree/tree.spec.ts:1814–1822

()

  @ViewChild(CdkTree) tree!: CdkTree<TestData>;

  constructor() {
    const dataSource = new FakeDataSource();
    const data = dataSource.data;
    const child = dataSource.addChild(data[1], false);
    dataSource.addChild(child, false);
    dataSource.addChild(child, false);

    this.dataSource = dataSource;
  }
}

@Component({