Does this allow for the client to say, "Give me all results matching x", and for the server to say, here's the first N results, but there are potentially more,

Does this allow for the client to say, "Give me all results matching x", and for the server to say, here's the first N results, but there are potentially more, and then the client can then ask for more, in multiple requests until it has them all, allowing them to progressively show results until they're all retrieved? That's how I would expect a JSON based protocol to work for pretty much all types of requests that provide potentially large lists in a response. I would expect getMailboxes to work this way too to be honest.