private String getResultsMessage(Map<String, RegionRedundancyStatus> regionResults,
      String baseMessage) {
    String message = baseMessage + System.lineSeparator();
    message += regionResults.values().stream().map(RegionRedundancyStatus::toString)
        .collect(Collectors.joining("," + System.lineSeparator()));
    return message;
  }
result object used by the cms that only needs to be json serializable
geode-management/src/main/java/org/apache/geode/management/internal/operation/RestoreRedundancyResultsImpl.java