@Override
  @Nullable
  public Object getParentElement(@NotNull Object element) {
    if (element instanceof AntBuildTarget) {
      if (element instanceof MetaTarget) {
        return ((MetaTarget)element).getBuildFile();
      }
      return ((AntBuildTarget)element).getModel().getBuildFile();
    }

    if (element instanceof AntBuildFile) {
      return myRoot;
    }

    return null;
  }
@Override
  @Nullable
  public Object getParentElement(@NotNull Object element)