Lifts an unwrapped function that returns an OptionT over Task into a PartialService.
Lifts a partial function that returns a Task into a PartialService.
Lifts a partial function that returns a Task into a PartialService. Where the
function is not defined, the PartialService returns OptionT.none
Lifts (by sequencing) an unwrapped function that returns an optional Task into a PartialService.