@Override
  public void cmnRmMemberId(long drId, PersistentMemberID pmid) {
    DiskRegionView dr = getDiskRegionById(drId);
    if (dr != null) {
      if (!dr.rmOnlineMember(pmid)) {
        if (!dr.rmOfflineMember(pmid)) {
          dr.rmEqualMember(pmid);
        }
      }
      // since we removed a member don't inc the live count
      // In fact decrement it by one since both this record
      // and the previous one are both garbage.
      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Set of members that have been revoked.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indicate to the user a member has been revoked, rather is simply conflicting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