static if(!(is(Type : GQLDCustomLeaf!Fs, Fs...)))
static if(!(is(Type == interface)))
static if(!(is(Type == class)))
static if(!(is(Type == union)))
static if(!(is(Type : Nullable!F, F)))
static if(!(is(Type : NullableStore!F, F)))
static if(!(is(Type : WrapperStore!F, F)))
static if(!(is(Type == struct)))
static if(isSomeString!Type)