function SystemTestController::preRenderCacheTags

Sets a cache tag on an element to help test #pre_render and cache tags.

File

core/modules/system/tests/modules/system_test/src/Controller/SystemTestController.php, line 275

Class

SystemTestController

Controller routines for system_test routes.

Namespace

Code

public static function preRenderCacheTags($elements) {
    $elements['#cache']['tags'][] = 'pre_render';
    return $elements;
}