code: public byte getByte(int index)
      {
          checkPositionIndexes(index, index + SIZE_OF_BYTE, this.length);
          index += offset;
          return data[index];
      }
docs: Gets a byte at the specified absolute {@code index} in this buffer.
  
  @throws IndexOutOfBoundsException if the specified {@code index} is less than {@code 0} or
  {@code index + 1} is greater than {@code this.capacity}