is decorator the right thing to use?

[Dmitry S. Makovey]

Dmitry S. Makovey wrote:
> In my real-life case A is a proxy to B, C and D instances/objects, not
> just one. 

forgot to mention that above would mean that I need to have more than one
decorator function like AproxyB, AproxyC and AproxyD or make Aproxy smarter
about which property of A has instance of which class etc. 

Unless I'm totally "out for lunch" and there are better ways of implementing
this (other than copy-pasting stuff whenever anything in B, C or D
changes).