@Override
  public boolean cmnDrfDelete(long oplogId) {
    if (drfIds.remove(oplogId)) {
      ifLiveRecordCount--;
      ifTotalRecordCount++;
      return true;
    } else {
      return false;
    }
  }
Set of members that have been revoked.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indicate to the user a member has been revoked, rather is simply conflicting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