@Deprecated
  public void readFields(DataInput in) throws IOException {
    boolean tmp = in.readBoolean();
    // If true, set region to top.
    this.region = tmp ? Range.top : Range.bottom;
    this.splitkey = Bytes.readByteArray(in);
  }
@deprecated Writables are going away. Use the pb serialization methods instead. Remove in a
            release after 0.96 goes out. This is here only to migrate old Reference files
            written with Writables before 0.96.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java