With st/x I used to struggle with dependencies between packages which 
included references to globals/classes. To avoid any such early bound 
references I used to  define a class called CLASS which you could use as

CLASS Array
CLASS String

as a short hand for Smalltalk at: #Array etc. This worked very well for me.

so thinking out load if my CLASS behaviour could be added to Class so that

Class WASession -> WASession

and we define WA similarly, then

WA Session -> WASession

If we make WA the current 'in' namespace, then Class could take that 
into account, so that

Class Session -> WASession

for tool support, each prefixed class would need to know its 
prefix.namespace so that tools could show the class name in browsers 
without the prefix.

WASession-namespace

^WA

its late....

Keith
>
>  >  +10000 for:
>  >  self add: (Kernel Array new: 4).
>  >  This mechanism preseves the elegant foundation of Smalltalk: 
> 'Everyting is an Object, which receives a messages and returns an object'.
>  >  In this (Dan's ?) solution, the implementation is late bound and 
> can use the same lookup algorithm as used for messages .  
>  >  The other solutions lack this elegance.
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>