Re: Copying parameter lists verbatim

[Dicebot via Digitalmars-d]

Also, vibe.d internal `cloneFunction` which generates copy of 
method/function signature with fully qualified type names (for 
mixin hygiene): 
https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/internal/meta/codegen.d#L177