toJson method
Implementation
Map<String, dynamic> toJson() => {
'data': data,
'cachedAt': cachedAt.toIso8601String(),
if (expiresAt != null) 'expiresAt': expiresAt!.toIso8601String(),
'accessCount': accessCount,
'lastAccessedAt': lastAccessedAt.toIso8601String(),
};