registerSubscription method

Subscription? registerSubscription(
  1. String topic,
  2. MqttQos qos
)

Registers a new subscription with the subscription manager.

Implementation

Subscription? registerSubscription(String topic, MqttQos qos) {
  var cn = tryGetExistingSubscription(topic);
  return cn ??= createNewSubscription(topic, qos);
}