reversed the compat

Author: weaverryan

src/Util/ClassSourceManipulator.php

@@ -952,9 +952,7 @@ private function setSourceCode(string $sourceCode): void
         $this->sourceCode = $sourceCode;
         $this->oldStmts = $this->parser->parse($sourceCode);
 
-        if (\is_callable($this->lexer->getTokens(...))) {
-            $this->oldTokens = $this->lexer->getTokens();
-        }
+        $this->oldTokens = $this->parser->getTokens();
 
         $traverser = new NodeTraverser();
         $traverser->addVisitor(new NodeVisitor\CloningVisitor());