@Override
  public void visitReferenceExpression(@NotNull GrReferenceExpression referenceExpression) {
    if (used) {
      return;
    }
    super.visitReferenceExpression(referenceExpression);
    final PsiElement element = referenceExpression.resolve();
    if (parameter.equals(element)) {
      used = true;
    }
  }
@Override
  public void visitReferenceExpression(@NotNull GrReferenceExpression referenceExpression)