Just that, really.
If a child goes to nursery several days per week and doesn't really have more than a couple of days to start off potty training with their parents, should nursery help out with following the routine right from the first stage (i.e. while there will still be several accidents and soiled items of clothing per day), or is it unreasonable to expect them to help until the child is reliably using the potty independently, taking off their clothes, saying when they need to go, etc?