toJson method
Implementation
Map<String, dynamic> toJson() => {
'startScreen': startScreen,
if (endScreen != null) 'endScreen': endScreen,
if (session != null) 'session': session,
'screensVisited': screensVisited,
'stepsOutline': stepsOutline,
if (stepDurationsMs.isNotEmpty) 'stepDurationsMs': stepDurationsMs,
if (stepStartTimes.isNotEmpty) 'stepStartTimes': stepStartTimes,
if (screens.isNotEmpty) 'screens': screens,
};