@Override
  public void deepCopySubRangeTo(int innerOffset, int copyLength, byte[] destination,
    int destinationOffset) {
    System.arraycopy(bytes, offset + innerOffset, destination, destinationOffset, copyLength);
  }
Returns true when {@code range} is of zero length, false otherwise.
hbase-common/src/main/java/org/apache/hadoop/hbase/util/AbstractByteRange.java