extract .manglof of template with lambda parameters

[Nicholas Wilson via Digitalmars-d-learn]

so I have a main as follows

int main(string[] args)
{
    int a = 3;
    map!((int x) => x*x)((GlobalPointer!int(&a)),a);
    return 0;
}
I want to get the mangleof of the generated call to map but 
without referencing it in the .o and then pass the mangleof to 
another function. the call to map must still be instantiated.

How do I do this?