code: private static final UByte[] mkValues() {
          UByte[] ret = new UByte[256];
  
          for (int i = Byte.MIN_VALUE; i <= Byte.MAX_VALUE; i++)
              ret[i & MAX_VALUE] = new UByte((byte) i);
  
          return ret;
      }
docs: Generate a cached value for each byte value.
  
  @return Array of cached values for UByte.