public static String getMergedArgs(IntroduceParameterObjectClassDescriptor descriptor,
                                     final List<? extends ParameterInfo> oldMethodParameters,
                                     final PsiElement[] args) {
    final StringBuilder newExpression = new StringBuilder();
    final ParameterInfo[] paramsToMerge = descriptor.getParamsToMerge();
    newExpression.append(StringUtil.join(paramsToMerge, parameterInfo -> getArgument(args, parameterInfo.getOldIndex(), oldMethodParameters), ", "));
    final ParameterInfo lastParam = paramsToMerge[paramsToMerge.length - 1];
    if (lastParam instanceof JavaParameterInfo && ((JavaParameterInfo)lastParam).isVarargType()) {
      final int lastArg = lastParam.getOldIndex();
      for (int i = lastArg + 1; i < args.length; i++) {
        newExpression.append(',');
        newExpression.append(getArgument(args, i, oldMethodParameters));
      }
    }

    return newExpression.toString();
  }
public static String getMergedArgs(IntroduceParameterObjectClassDescriptor descriptor,
                                     final List<? extends ParameterInfo> oldMethodParameters,
                                     final PsiElement[] args)