import ( "github.com/docker/machine/drivers" "github.com/docker/machine/drivers/amazonec2" ) func createMachine() error { driver := &amazonec2.Driver{} driverOpts := driver.GetCreateFlags() err := driverOpts.Resolve() if err != nil { return err } err = driver.SetConfigFromFlags(driverOpts) if err != nil { return err } driverOpts.Int("instance-count", 1) driverOpts.Int("instance-types", "t2.micro") machine, err := driver.Create() if err != nil { return err } err = machine.Start() if err != nil { return err } return nil }In this example, we import the "github.com/docker/machine/drivers/amazonec2" package, which provides the Amazon EC2 driver. We create a new instance of the driver and get its driver-specific options using the "driver.GetCreateFlags()" method. We then call the "Resolve()" method on the driver-specific options to validate and convert them. After that, we set the driver configuration options from command-line flags using the "SetConfigFromFlags()" method. We also use the "Int()" method on the driver-specific options to set two custom configuration options, "instance-count" and "instance-types". Finally, we create a new machine using the driver and start it. Overall, this example demonstrates how to use the DriverOptions interface to set driver configuration options and create a new machine.