@Override
  public void cmnClearRegion(long drId,
      ConcurrentHashMap<DiskStoreID, RegionVersionHolder<DiskStoreID>> memberToVersion) {
    DiskRegionView drv = getDiskRegionById(drId);
    if (drv.getClearRVV() == null) {
      ifLiveRecordCount++;
    }
    // otherwise previous clear is cancelled so don't change liveRecordCount
    ifTotalRecordCount++;

    DiskStoreID ownerId = parent.getDiskStoreID();
    // Create a fake RVV for clear purposes. We only need to memberToVersion information
    RegionVersionHolder<DiskStoreID> ownerExceptions = memberToVersion.remove(ownerId);
    long ownerVersion = ownerExceptions == null ? 0 : ownerExceptions.getVersion();
    DiskRegionVersionVector rvv =
        new DiskRegionVersionVector(ownerId, memberToVersion, ownerVersion,
            new ConcurrentHashMap<>(), 0L, false, ownerExceptions);
    drv.setClearRVV(rvv);
  }
Set of members that have been revoked.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indicate to the user a member has been revoked, rather is simply conflicting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