unsubscribe method
Unsubscribes from a specific subscription by name.
subscriptionName: The name of the subscription to cancel.
If no such subscription exists, this method does nothing.
Implementation
void unsubscribe(String subscriptionName) {
if (_subscriptions.containsKey(subscriptionName)) {
_subscriptions[subscriptionName]?.cancel();
_subscriptions.remove(subscriptionName);
debugPrint("🔴 Unsubscribed from $subscriptionName.");
} else {
debugPrint("⚠️ No active subscription for $subscriptionName.");
}
}