@Override
  public boolean equals(Object o) {
    if (o instanceof TimestampLocalTZWritable) {
      return compareTo((TimestampLocalTZWritable) o) == 0;
    }
    return false;
  }
@return double representation of the timestampTZ, accurate to microseconds
serde/src/java/org/apache/hadoop/hive/serde2/io/TimestampLocalTZWritable.java