fix back

Author: retanoj

litellm/google_genai/adapters/handler.py

@@ -38,8 +38,8 @@ def _prepare_completion_kwargs(
         completion_kwargs: Dict[str, Any] = dict(completion_request)
 
         # feed metadata for custom callback
-        # if 'metadata' in extra_kwargs:
-        #     completion_kwargs['metadata'] = extra_kwargs['metadata']
+        if 'metadata' in extra_kwargs:
+            completion_kwargs['metadata'] = extra_kwargs['metadata']
 
         if stream:
             completion_kwargs["stream"] = stream