toJson method
Converts an instance of Topics to a JSON map.
This method is used to serialize Topics instances into a map structure that can easily be converted to JSON. This is useful for storing the instance in a database or sending it over a network.
Returns: A map representing the serialized form of the Topics instance.
Implementation
Map<String, dynamic> toJson() => {
"topicName": topicName,
"topicId": topicId,
"metaData": metaData,
};