将grails与类似于以下的域类层次结构一起使用时:abstractclassVehicle{...}classCarextendsVehicle{...}classMotorcycleextendsVehicle{...}和如下服务:classVehicleService{defstartRepairing(Carcar){...}defstartRepairing(Motorcyclemotorcycle){...}}我们在生产中经常遇到如下错误:Nosignatureofmethod:VehicleService.startRepairing()isapplicableforar