{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"(GenericArgKind::Const(v1),"}]}
                (GenericArgKind::Const(v1), GenericArgKind::Const(v2)) => {
                }
                    let ok = self.at(cause, param_env).eq(DefineOpaqueTypes::Yes, v1, v2)?;