* @param key The key associated with this entry
* @param bytes A one dimensional byte array containing concatenated IDs
* @return A byte[][] which represents an array of ids
*/
public Object decodeFromByteArray(Key key, byte[] bytes) throws EncodingException {
if ((bytes.length % 8) != 0) throw new EncodingException("Trailing garbage in input");
byte[][] ret = new byte[bytes.length / 8][8];
for (int i = 0; i < ret.length; i++)
System.arraycopy(bytes, i * 8, ret[i], 0, 8);
return ret;
}