'default', 'grid' => 'grid' ]; protected function getTitle(string $viewMode): string { $active = null; $inactive = null; switch ($viewMode) { case 'list': $active = t('List view active'); $inactive = t('Switch to list view'); break; case 'grid': $active = t('Grid view active'); $inactive = t('Switch to grid view'); break; } return $viewMode === $this->getViewMode() ? $active : $inactive; } }