One of the benefits of writing ATL classes is that the classes create their own data, which means we can tell them to ensure that a process can be performed.
For example, we can't create a vehicle without a vehicle group, and we know from the code that we also need a default vehicle group. Here, we need to write a method starting with ensure, such as ensureCanCreateVehicle().
To demonstrate this, we will add ConVMSVehicleTableCars to our ATL data class structure.