byKey and byValue: properties or methods?

[bearophile]

Andrei Alexandrescu:

> I tallied the votes.
> 
> Function: Mail Mantis, bearophile, Jacob Carlborg, Olivier Pisano, Ary 
> Manzana, torhu.
> 
> Property: Nick Sabalausky, Simen Kjaeraas.
> 
> I wasn't able to discern a clear vote from the others. Please correct 
> the list.

I vote for byKey and byValue to be properties.

Bye,
bearophile