{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"TyKind::AssociatedType(assoc_ty_b,"}]}
                TyKind::AssociatedType(assoc_ty_b, sub_b),
                TyKind::AssociatedType(assoc_ty_a, sub_a),
            ) if assoc_ty_a == assoc_ty_b => zip_substs(self, None, sub_a, sub_b)?,