private static @NotNull String buildUnescapedFormatString(@NotNull UStringConcatenationsFacade cf,
                                                            @NotNull List<? super UExpression> formatParameters,
                                                            @NotNull Project project,
                                                            boolean nested) {
    StringBuilder result = new StringBuilder();
    boolean noEscapingRequired = !nested && SequencesKt.all(cf.getUastOperands(), expression -> expression instanceof ULiteralExpression);
    for (UExpression expression : SequencesKt.asIterable(cf.getUastOperands())) {
      while (expression instanceof UParenthesizedExpression) {
        expression = ((UParenthesizedExpression)expression).getExpression();
      }
      if (expression instanceof ULiteralExpression) {
        Object value = ((ULiteralExpression)expression).getValue();
        if (value != null) {
          if (noEscapingRequired) {
            result.append(value);
          }
          else {
            String formatString = PsiConcatenationUtil.formatString(value.toString(), false);
            result.append(nested ? PsiConcatenationUtil.formatString(formatString, false) : formatString);
          }
        }
      }
      else if (nested || !addChoicePattern(expression, formatParameters, project, result)) {
        result.append("{").append(formatParameters.size()).append("}");
        formatParameters.add(expression);
      }
    }
    return result.toString();
  }
private static @NotNull String buildUnescapedFormatString(@NotNull UStringConcatenationsFacade cf,
                                                            @NotNull List<? super UExpression> formatParameters,
                                                            @NotNull Project project,
                                                            boolean nested)