private @NotNull String buildString(@NotNull Predicate<? super IndexVersion.IndexVersionDiff> condition) {
    return indexVersionDiffs
      .entrySet()
      .stream()
      .filter(e -> condition.test(e.getValue()))
      .map(e -> e.getKey().getName() + e.getValue().getLogText())
      .collect(Collectors.joining(","));
  }
private @NotNull String buildString(@NotNull Predicate<? super IndexVersion.IndexVersionDiff> condition)