@Override
  public void clearSourceFolders() {
    List<JpsModuleSourceRoot> toRemove = new ArrayList<>();
    for (JpsSourceFolder folder : mySourceFolders) {
      toRemove.add(folder.getSourceRoot());
      Disposer.dispose(folder);
    }
    mySourceFolders.clear();
    for (JpsModuleSourceRoot root : toRemove) {
      myModule.removeSourceRoot(root.getUrl(), root.getRootType());
    }
  }
@Override
  public void clearSourceFolders()