Continues this process from checkpoint on definition's screen, sending
nothing: the client state was restored by the app layer built from the same
checkpoint, and this puts back the process state, the trail and the whole
screen stack with each frame's data and items. The returned handle is the top
screen's; the screen set's caller narrows it with XxxScreen.is.
Continues this process from
checkpointondefinition's screen, sending nothing: the client state was restored by the app layer built from the same checkpoint, and this puts back the process state, the trail and the whole screen stack with each frame's data and items. The returned handle is the top screen's; the screen set's caller narrows it withXxxScreen.is.