code: public short getShort(int index)
      {
          checkIndexLength(index, SizeOf.SIZE_OF_SHORT);
          return unsafe.getShort(base, address + index);
      }
docs: Gets a 16-bit short integer at the specified absolute {@code index} in
  this slice.
  
  @throws IndexOutOfBoundsException if the specified {@code index} is less than {@code 0} or
  {@code index + 2} is greater than {@code this.length()}