Ad missing use

src/Server/TextDocument.php

@@ -27,7 +27,7 @@ use Microsoft\PhpParser\Node;
 use Sabre\Event\Promise;
 use Sabre\Uri;
 use function LanguageServer\{
-    isVendored, waitForEvent
+    isVendored, waitForEvent, getPackageName
 };
 use function Sabre\Event\coroutine;