Identifying the services/methods
switch moveUp increment switch value as above
moveDown decrement switch value as above
state? return a value indicating the current switch state
fuse working? indicate if the fuse has blown or not
wiper motor working? indicates whether the wipers are working or not
pump working? indicates whether the pump is active or not
water bottle fill fill the water bottle with water
extract remove some water from the water bottle
empty empty the water bottle