I am trying to understand how the VM make the distinction between
ByteArray WordArray ByteString and Array.
I look at #commonAt:Put:, #commonAt: and
I see that ByteArray and ByteString a handle quite the same way except
that there is a #asciiOfCharacter: and #characterForAscii:.
And Array use either storePointer or storeLong32 (fetchPointer,
Then I don't see the case of the WordArray.
Could someone enlighten me?