unsubscribe method
Implementation
Future<void> unsubscribe(ParseLiveQuerySubscription subscription) async {
final unsubscribeMessage = <String, dynamic>{
'op': 'unsubscribe',
'requestId': subscription.requestId,
};
if (parseLiveQueryClient.isConnected) {
parseLiveQueryClient.sendMessage(json.encode(unsubscribeMessage));
mapRequestSubscription.remove(subscription.requestId);
}
}