[Pharo-project] Replace ByteArray with a smaller one

Hi guys. I have a ByteArray of size N. And I want now only the same ByteArray but from 1 to N-X. I am using #copyFrom:to: but that one answers a new copy. If the ByteArray is large, this takes time because it needs to allocate a large object. In my case I don't care and I can modify the original ByteArray itself (lets say make it smaller, null the remaining part and change the object header info). That way I would avoid an extra allocation. Is there a primitive for that? Thanks! -- Mariano http://marianopeck.wordpress.com