@Override
  public PsiComment findExistingDocComment(PsiComment contextElement) {
    if (contextElement instanceof GrDocComment) {
      final GrDocCommentOwner owner = GrDocCommentUtil.findDocOwner((GrDocComment)contextElement);
      if (owner != null) {
        return owner.getDocComment();
      }
    }
    return null;
  }
@Override
  public PsiComment findExistingDocComment(PsiComment contextElement)