MqttTopicSubscription (Vert.x MQTT 5.0.0 API)

```
public interface MqttTopicSubscription
```
Represents a subscription to a topic

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`io.netty.handler.codec.mqtt.MqttQoS`	`qualityOfService()`
`io.netty.handler.codec.mqtt.MqttSubscriptionOption`	`subscriptionOption()`	Subscription option
`String`	`topicName()`

- Method Detail
  - topicName
```
String topicName()
```
    Returns:
    
    Subscription topic name
  - qualityOfService
```
io.netty.handler.codec.mqtt.MqttQoS qualityOfService()
```
    Returns:
    
    Quality of Service level for the subscription
  - subscriptionOption
```
io.netty.handler.codec.mqtt.MqttSubscriptionOption subscriptionOption()
```
    Subscription option
    
    Returns:
    
    Subscription options