formatQualifiers

    class A
    {
        int a;
        int make() const shared @property
        {
            return a;
        }

        int makePure() inout pure @safe
        {
            return a;
        }

        int makeImut() immutable nothrow @trusted
        {
            return a;
        }

        ref int makeRef()
        {
            return a;
        }
    }
    auto aimut = new immutable(A);
    auto aconst = new const shared(A);
    auto amut = new A;
//  assert(qualifiers!(aimut.makeImut)().sort().array() == [Qual!"immutable", Qual!"nothrow", Qual!"@trusted"].sort);
//  assert(qualifiers!(aconst.makePure)().sort().array() == [Qual!"@safe", Qual!"inout", Qual!"pure"].sort);
//  assert(qualifiers!(aconst.make)().sort().array() == [Qual!"@property", Qual!"@system", Qual!"const", Qual!"shared"].sort);
    assert(qualifiers!(amut.makeRef)().sort().array() == [Qual!"@system", Qual!"ref"]);
//  assert(qualifierMatch!(aconst.make).matches([Qual!"@property", Qual!"@system", Qual!"const", Qual!"shared"].sort));
//  assert(!qualifierMatch!(aconst.make).matches([Qual!"@property", Qual!"@system", Qual!"shared"].sort));
//  assert(!qualifierMatch!(aconst.make).matches([Qual!"@property", Qual!"ref", Qual!"@system", Qual!"shared"].sort));
//  assert(!qualifierMatch!(aconst.make).matches(["property", Qual!"@system", Qual!"shared"].sort));