private @Nullable String loadValidatorsFromLocalCache(@NotNull String recorderId) {
    String rawEventsScheme = myMetadataPersistence.getCachedEventsScheme();
    if (rawEventsScheme != null) {
      try {
        String newVersion = updateValidators(rawEventsScheme);
        EventLogSystemLogger.logMetadataLoad(recorderId, newVersion);
        return newVersion;
      }
      catch (EventLogMetadataParseException e) {
        EventLogSystemLogger.logMetadataErrorOnLoad(myRecorderId, e);
      }
    }
    return null;
  }
private @Nullable String loadValidatorsFromLocalCache(@NotNull String recorderId)