Altering Entity View to Add Cache Contexts

            

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/**
* Implements hook_entity_view_alter() to add cache contexts.
*/
function my_module_entity_view_alter(array &$build, \Drupal\Core\Entity\EntityInterface $entity, \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, $view_mode) {
   $build['#cache']['contexts'][] = 'user.permissions';
}