Actualización

vendor/symfony/validator/Constraints/IsNull.php

@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class IsNull extends Constraint
+{
+    const NOT_NULL_ERROR = '60d2f30b-8cfa-4372-b155-9656634de120';
+
+    protected static $errorNames = array(
+        self::NOT_NULL_ERROR => 'NOT_NULL_ERROR',
+    );
+
+    public $message = 'This value should be null.';
+}