@Override
  public Boolean visit(final StringLiteralExpr n1, final Node arg) {
    final StringLiteralExpr n2 = (StringLiteralExpr) arg;

    if (!objEquals(n1.getValue(), n2.getValue())) {
      return Boolean.FALSE;
    }

    return Boolean.TRUE;
  }
 @Override
 public void visit(final StringLiteralExpr n, final A arg) {
   visitComment(n.getComment(), arg);
 }