toJson method
Serializes the entry to JSON for disk storage.
Implementation
Map<String, dynamic> toJson() => {
'statusCode': response.statusCode,
'headers': response.headers,
'body': response.body,
'cachedAt': cachedAt.toIso8601String(),
'expiresAt': expiresAt.toIso8601String(),
'key': key,
};