@Override
  protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {
    super.serializeStateData(serializer);
    serializer.serialize(ProtobufUtil.toRegionInfo(getRegion()));
  }
Used when deserializing. Otherwise, DON'T TOUCH IT!
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineRegionProcedure.java