- if (is_string($filter)) {
- @trigger_error(sprintf('The $message argument of the "%s()" method at 3rd position is deprecated since Symfony 3.4 and will be moved at 4th position in 4.0.', __METHOD__), E_USER_DEPRECATED);
+ if (\is_string($filter)) {
+ @trigger_error(sprintf('The $message argument of the "%s()" method at the 3rd position is deprecated since Symfony 3.4 and will be moved at the 4th position in 4.0.', __METHOD__), E_USER_DEPRECATED);