private static boolean isNewConcat(NewExprent expr, VarType cltype) {
    if (expr.getNewType().equals(cltype)) {
      VarType[] params = expr.getConstructor().getDescriptor().params;
      return params.length == 0 || params.length == 1 && params[0].equals(VarType.VARTYPE_STRING);
    }

    return false;
  }
private static boolean isNewConcat(NewExprent expr, VarType cltype)