Deinitialization process unclear

It is not clear to me what order requirements the libsoundio API has in regards to deinitialization (*_destroy).

Main question:

Does calling soundio_destroy guaranteed that all devices and streams created from that context are cleaned up? In other words: Is destroying streams (or unrefing devices) immediately before calling soundio_destroy **guaranteed by API** to be pointless?

If no: Given several streams and devices for a context, which functions are required for a complete cleanup and in what order must they be called by the user?