@Override
  public void cmnOfflineMemberId(long drId, PersistentMemberID pmid) {
    DiskRegionView dr = getDiskRegionById(drId);
    if (dr != null) {
      dr.addOfflineMember(pmid);
      if (dr.rmOnlineMember(pmid) || dr.rmEqualMember(pmid)) {
        ifLiveRecordCount--;
      }
      ifLiveRecordCount++;
      ifTotalRecordCount++;
    } else {
      if (logger.isTraceEnabled(LogMarker.PERSIST_RECOVERY_VERBOSE)) {
        logger.trace(LogMarker.PERSIST_RECOVERY_VERBOSE, "bad disk region id!");
      } else {
        throw new IllegalStateException("bad disk region id");
      }
    }
  }
Set of members that have been revoked. We keep track of the revoked members so that we can
indicate to the user a member has been revoked, rather is simply conflicting
geode-core/src/main/java/org/apache/geode/internal/cache/DiskInitFile.java