enterCalibrationMode method
      
void
enterCalibrationMode(
    
- OnCalibrationPointClickedCallback pointsCallback,
- OnCalibrationFinishedCallback finishedCallback
Modifies the state of the underlying MapView so it allows building calibrations.
Do not use this method as it is intended for internal use.
Implementation
void enterCalibrationMode(OnCalibrationPointClickedCallback pointsCallback,
    OnCalibrationFinishedCallback finishedCallback) {
  _setUIMode(UIMode.calibration);
  _onCalibrationFinishedCallback = finishedCallback;
  _onCalibrationPointClickedCallback = pointsCallback;
}