threads branch: What is purpose of lib/Parrot/Pmc2c/PMC/Proxy.pm?

[James E Keenan]

In the threads branch, I see that there exists a file which does not 
(or, perhaps, no longer) exist in master: 
lib/Parrot/Pmc2c/PMC/Proxy.pm.  Parrot::Pmc2c::PMC::Proxy inherits from 
Parrot::Pmc2c::PMC.  It provides only one public method, 
pre_method_gen(), which presumably overrides 
Parrot::Pmc2c::PMC::pre_method_gen() whenever Parrot::Pmc2c::PMC::Proxy 
is 'use'd.

However, AFAICT, Parrot::Pmc2c::PMC::Proxy is only imported into one 
other package:

$ ack 'use Parrot::Pmc2c::PMC::Proxy' lib/
lib/Parrot/Pmc2c/Pmc2cMain.pm
20:use Parrot::Pmc2c::PMC::Proxy ();

But Pmc2cMain never invokes pre_method_gen().  Hence, nothing from 
lib/Parrot/Pmc2c/PMC/Proxy.pm appears to be used anywhere -- implying 
that it can and should be deleted.

Can anyone explain what lib/Parrot/Pmc2c/PMC/Proxy.pm does?

Thank you very much.
Jim Keenan