signatures, multi and named arguments

[mt1957]

I was wondering if the long name of sub/method/submethod also includes 
the named arguments to differentiate between multi's. I had problems 
using multi on  BUILD submethods which only accept named arguments. The 
dispather (also with other named methods) always takes the first method 
of the multi's and doesn't choose the proper one looking at the named 
arguments.

Is this behavior correct?
For the moment I can get by using callsame after doing tests on the 
arguments.

perl6 version 2015.09-95-g3970634 built on MoarVM version 
2015.09-35-gd15a446

Greetings
Marcel Timmerman