{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"(GenericArgKind::Lifetime(v1),"}]}
                (GenericArgKind::Lifetime(v1), GenericArgKind::Lifetime(v2)) => {
                }
                    self.inner.borrow_mut().unwrap_region_constraints().make_eqregion(