TomTom SDK for iOS ParkingAvailabilityTrend ParkingAvailabilityTrend public enum ParkingAvailabilityTrend Prediction on available parking availability. emptying The number of available parking spots is increasing. Declaration Swift case emptying fillingUp The number of available parking spots is decreasing. Declaration Swift case fillingUp static The number of available parking spots is oughly unchanged. Declaration Swift case `static`