for (var go : GameObjectin objs) { var localPath : String = "Assets/" + go.name + ".prefab"; if (AssetDatabase.LoadAssetAtPath(localPath, GameObject)) { if (EditorUtility.DisplayDialog("Are you sure?", "The prefab already exists. Do you want to overwrite it?", "Yes", "No")) createNew(go, localPath); } else { createNew(go, localPath); }