how to determine if type is final/abstract

[JS]

I have some code that needs to determine if a type 
isFinalFunction or isAbstractFunction but they don't seem to work:

    foreach(k, t; TargetMembers)
    {
        alias TypeTuple!(t.type)[0] type;
        if (isFinalFunction!(t)) { ... }
    }
the if statement never gets executed. I've tried using type 
instead of t and various other things. I suppose the

the function is defined as

final string foo() { ...}

but TargetMembers is

"tuple(FuncInfo!("foo", pure nothrow @safe string()), 
FuncInfo!("Value", @property int()), FuncInfo!("Value", @property 
int(int value)))"

I believe the issue is that isFinalFunction requires an actual 
function symbol but I'm passing it a string?


How can I get this to work?