Add trim filter

Author: wol-soft

src/Filter/Trim.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace PHPModelGenerator\Filter;
+
+/**
+ * Class Trim
+ *
+ * @package PHPModelGenerator\Filter
+ */
+class Trim
+{
+    public static function filter(?string $value): ?string
+    {
+        return $value !== null ? trim($value) : null;
+    }
+}