how to skip sub functions in __traits(allMembers)

[BBaz via Digitalmars-d-learn]

I try to build a symbol table:

---
module aveb;
import std.stdio;
import std.algorithm.searching;
import std.ascii;

void* [string] sig;

void ana(alias mod)()
{
    import std.traits;
    foreach(memb;__traits(allMembers,mod))
    static if 
(canFind(["package","public"],__traits(getProtection,memb)))
        static if (isSomeFunction! (__traits(getMember,mod,memb) 
))
            foreach(ov;__traits(getOverloads,mod,memb))
                sig[memb] = &__traits(getMember,mod,memb);
}

void main(string[] args)
{
    //ana!(std.ascii); //ok
    ana!(std.traits);
    writeln(sig);
}
---

Error: function std.traits.demangleParameterStorageClass is not 
accessible from module aveb
Error: function std.traits.demangleParameterStorageClass is not 
accessible from module aveb
etc


problem is that the sub functions are not accessible. i'd like to 
skip them.