layout_builder_system_breadcrumb_alter example

protected static $modules = [
    'layout_builder',
    'layout_discovery',
  ];

  /** * Check that there are no errors when alter called with null route match. */
  public function testBreadcrumbAlterNullRouteMatch() {
    $breadcrumb = new Breadcrumb();
    $route_match = new NullRouteMatch();
    layout_builder_system_breadcrumb_alter($breadcrumb, $route_match, []);
  }

}