How to use the @bentley/ui-components.BreadcrumbPath function in @bentley/ui-components

public render() {
    const path = new BreadcrumbPath(demoMutableTreeDataProvider);

    DragDropLayerManager.registerTypeLayer(TreeDragTypes.Parent, ParentDragLayer);
    DragDropLayerManager.registerTypeLayer(TreeDragTypes.Child, ChildDragLayer);

    let objectTypes: Array = [];
    if (treeDropProps.objectTypes) {
      if (typeof treeDropProps.objectTypes !== "function")
        objectTypes = treeDropProps.objectTypes;
      else
        objectTypes = treeDropProps.objectTypes();
    }
    if (this.state.checked)
      objectTypes.push(TableDragTypes.Row);

    const dragProps = treeDragProps;
    const dropProps = {