toJson method
Implementation
@override
Map<String, Object?> toJson() => {
...envelopeJson(),
'capturedAt': capturedAt,
'counts': counts.toJson(),
'history': history.toJson(),
'snapshots': snapshots.toJson(),
'activePreviews': activePreviews
.map((preview) => preview.toJson())
.toList(growable: false),
};