In most Solid libraries, passing an authenticated fetch function commonly uses the fetch parameter. For both internal consistency and aligning with the convention of other libraries, I think the parameter passed to unsubscribe should also be called fetch. If there is a good reason that unsubscribe renames the parameter, it would be helpful if that was documented in lib/unsubscribe.
In most Solid libraries, passing an authenticated fetch function commonly uses the
fetchparameter. For both internal consistency and aligning with the convention of other libraries, I think the parameter passed tounsubscribeshould also be calledfetch. If there is a good reason thatunsubscriberenames the parameter, it would be helpful if that was documented inlib/unsubscribe.