collectionToJson function
Implementation
@visibleForTesting
List<dynamic> collectionToJson({required dynamic collection}) {
final docs = collection['documents'] as List<dynamic>?;
if (docs == null) {
throw Exception('Cannot parse this firestore collection, "documents" fields is missing.'
'\nReceived collection $collection');
}
final jsonDocs = docs.map((document) => toStandardJsonFormat(firestoreJson: document)).toList();
return jsonDocs;
}