getter & setter for private objects

[Brendan Eich]

The upshot for memolus is that with is already a deoptimizer that  
introduces non-lexical names onto the scope chain. These can be  
gettters and setters and have arbitrary effects. My point remains that  
adding getters and setters to activations, which are modeled lexically  
in the absence of eval, in strict mode in ES5, and under other such  
conditions, is a non-starter.

/be