Method constructor

docs/scenes/src/app/scenes/tree/tree-scene.ts:63–66

()

  dataSource = new MatTreeFlatDataSource(this.treeControl, this.treeFlattener);

  constructor() {
    this.dataSource.data = TREE_DATA;
    this.treeControl.expandAll();
  }

  private _transformer(node: FileNode, level: number) {
    return {