How to import for mixin contents only.

[Andrea Fontana via Digitalmars-d-learn]

On Thursday, 10 March 2016 at 16:20:42 UTC, Taylor Hillegeist 
wrote:
> I feel like this should do what i want it too. but it doesn't.
>
> struct Color_t {
> 	static if(1==1){
> 		import std.bitmanip:bitfields;
> 		immutable string item = bitfields!(		
> 				uint, "R",    8,
> 				uint, "G",   8,
> 				uint, "B",    8,
> 				uint, "A", 8);
> 	}
> 	mixin(item);
> }

I wonder if compiler is smart enaugh to undestand that dependency 
is not needed at runtime in this case:

http://dpaste.dzfl.pl/fd3bc2a839a3