toolbar_page_top

toolbar_page_top(array &$page_top)

function toolbar_page_top(array &$page_top) {
  $page_top['toolbar'] = array(
    '#type' => 'toolbar',
    '#access' => \Drupal::currentUser()->hasPermission('access toolbar'),
    '#cache' => [
      'keys' => ['toolbar'],
      'contexts' => ['user.permissions'],
    ],
  );
}