Adding Multiple sorting conditions

[nyamsprod]

The IteratorQuery trait enable sorting the CSV. But as of now you can only set one sorting condition by query.

The current IteratorQuery::setSortBy behaviour is somehow difficult to understand so I'm thinking this method needs an important rewrite to enable

• Setting multiple sorting conditions
• Allow for a simpler method call

If we register multiple sorting condition :

• should the registration order matter ?
• should we be able to register/unregistered the settings ?

[nyamsprod]

Implementing these changes would break the API and the added values is not worth it.