getParentNode()

in docs-content/examples-source/cdk/tree/cdk-tree-flat/cdk-tree-flat-example.ts [89:99]


  getParentNode(node: ExampleFlatNode) {
    const nodeIndex = TREE_DATA.indexOf(node);

    for (let i = nodeIndex - 1; i >= 0; i--) {
      if (TREE_DATA[i].level === node.level - 1) {
        return TREE_DATA[i];
      }
    }

    return null;
  }