toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (audible != null) 'audible': audible!,
if (timeMillis != null) 'timeMillis': timeMillis!,
if (timePercent != null) 'timePercent': timePercent!,
if (viewabilityPercent != null)
'viewabilityPercent': viewabilityPercent!,
};