@Override
            int putInt(byte[] bytes, int offset, int val) {
                for (int i = offset + 3; i > offset; i--) {
                    bytes[i] = (byte) val;
                    val >>>= 8;
                }
                bytes[offset] = (byte) val;
                return offset + SIZEOF_INT;
            }
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