toJson method
Converts an IdentifierMetaData instance to a JSON map.
This method serializes an IdentifierMetaData instance into a map structure that can easily be converted to JSON. It is useful for storing or transmitting identifiable metadata in a JSON format.
Returns: A map representing the serialized form of the IdentifierMetaData instance.
Implementation
Map<String, dynamic> toJson() => {
"key": key,
"value": value,
};