//Create a new Loader. This may error is Docker is not accessible
l, err := docker.NewLoader()
//Create a new MongoDB container using the loader
mongo, err := NewMongoDBContainer(context.Background(), l)
//Obtain an mgo.Session to contact MongoDB
ssn, err := mongo.NewSession()
//Do something with the Session
err = ssn.Ping()
//Stop and remove the MongoDB container
err = l.StopService(context.Background(), mongo)
_ = err

//Create a new Loader. This may error is Docker is not accessible
loader, err := docker.NewLoader()
helloWorldSpec := docker.ServiceSpecification{
  FullyQualifiedImageName: "library/hello-world",
  ContainerConfig: &container.Config{
    Image: "hello-world",
  },
}
service, err := loader.StartService(context.Background(), &helloWorldSpec)
//no StopService call since "hello-world" exits on its own
_ = err