This code doesn't work:
-------------------------------------
import std.traits;
class A
{
	void foo() const { }
}

void main()
{
	auto a = new A;
	static assert(functionAttributes!(a.foo) != FunctionAttribute.none);
}
-------------------------------------

functionAttributes does not consider these attributes now.
functionAttributes should consider these attributes.
Or there should be a different method to examine it. (eg. functionQualifiers