Method with

src/material/tree/testing/tree-harness.ts:28–30

* Gets a `HarnessPredicate` that can be used to search for a tree with specific attributes. * @param options Options for narrowing the search * @return a `HarnessPredicate` configured with the given options.

(options: TreeHarnessFilters = {})

   * @return a `HarnessPredicate` configured with the given options.
   */
  static with(options: TreeHarnessFilters = {}): HarnessPredicate<MatTreeHarness> {
    return new HarnessPredicate(MatTreeHarness, options);
  }

  /** Gets all of the nodes in the tree. */
  async getNodes(filter: TreeNodeHarnessFilters = {}): Promise<MatTreeNodeHarness[]> {