message: test(persistentModel): fix wrong type as parameter
diff: @@ -19,7 +19,7 @@ export abstract class PersistentModel {
  }
  // define an instance method that is called by the derived class
  - public async addCar(this: DocumentType<PersistentModel>, car: Car) {
  + public async addCar(this: DocumentType<PersistentModel>, car: DocumentType<Car>) {
  if (!Array.isArray(this.cars)) {
  this.cars = [];
  }
  