code: func GetDriverVersion() (string, error) {
  	task := TaskCreate(deviceVersion)
  	if task == nil {
  		return "", fmt.Errorf("devicemapper: Can't create deviceVersion task")
  	}
  	if err := task.run(); err != nil {
  		return "", err
  	}
  	return task.getDriverVersion()
  }
docs: // GetDriverVersion is the programmatic example of "dmsetup version".
  // It outputs version information of the driver.