[modern] how to use connection in mutation's updater or config

# mutation updater nest connection

```js
const mutation = graphql`
mutation updateAccountRoles_Mutation (
$input: updateUserRolesInput!
){
updateUserRoles(input: $input){
account {
roles {
edges {
node {
id
name
}
}
}
}
}
}
`;
```
> At first i think relay modern will udpate the account node auto.But nothing happen.l try to use connectionHandler to update the roles connection.but connectionHandler.update doesn't work too.

> there has edges in response . But the ui doesn't update. in the component componetWillReceiveProps
doesn't work too.

> l don't know how to update the whole connection?Anybody can help me? thank you