@Override
  protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {
    super.deserializeStateData(serializer);
    this.hri = ProtobufUtil.toRegionInfo(serializer.deserialize(HBaseProtos.RegionInfo.class));
  }
Used when deserializing. Otherwise, DON'T TOUCH IT!
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineRegionProcedure.java