Should methods like MatrixClient.getRooms() throw a warning/error if client was not started?

[cedricvanrompay]

I lost quite some time with a bug that was caused by me calling MatrixClient.createRoom then MatrixClient.getRooms without having called MatrixClient.startClient (as a result the client was not syncing and not updating its room list, even though the call to createRoom did return successfully with a room Id).

I think that, unless there are some use cases where it makes sense to call MatrixClient.getRooms on a client that has not been started yet, the method should probably throw an error or a warning if the client was not started.

This would apply to every method that requires the client to be synchronizing.

[turt2live]

I don't think it explicitly requires the client to be syncing: if the client was syncing, stored some data, and was re-loaded from that data then it should have rooms to report. Instead, clarifying the documentation on functions like this to say that they are more or less pointless without a syncing client could help.