How to test templates for equality?

[Uranuz via Digitalmars-d-learn]

I have a question. How could I know if some alias or template 
parameter is some template symbol. I want to not that I want to 
know that symbol is template symbol itself but not instance of 
template (std.traits.isInstanceOf give answer for that question). 
I'll give some example

template Foo(T...)
{

}

template isFoo(alias F)
{


}