@Override
            int toInt(byte[] bytes, int offset, int length) {
                int n = 0;
                for (int i = offset; i < (offset + length); i++) {
                    n <<= 8;
                    n ^= bytes[i] & 0xFF;
                }
                return n;
            }
Returns the Unsafe-using Converter, or falls back to the pure-Java implementation if unable
to do so.
stroom-bytebuffer/src/main/java/stroom/bytebuffer/hbase/Bytes.java