{"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"if"}]}
                    if ty.is_str() {
                while let TyKind::Ref(_, _, ty) = arg.ty.kind(Interner) {
                        let (pointee, metadata) = arg.interval.get(self)?.split_at(self.ptr_size());