@startuml
    package mqtt_actor {
        struct MqttConnectionManager{
            from(..) -> Self
            add_subscription(..)
            start()
        }
        annotation MqttPublisher
        struct MqttPublisherActor
        struct MqttPublisherActor_mock #gray
        interface Subscription
        'struct DumpHandler #white
        'Struct EchoHandler #white
        'struct "echoHandler <Handler<StringMessage>>" as strmsg #white

        MqttConnectionManager *-- MqttPublisher: publisher_actor
        MqttPublisher <|-- MqttPublisherActor
        MqttPublisher <|-- MqttPublisherActor_mock : <<unit test>>
        'Subscription <|-- DumpHandler
        'Subscription <|-- EchoHandler
        'MqttPublisher ..|> strmsg : implement
        'EchoHandler --> strmsg: calls

    }
    struct yourSubscription
    yourSubscription --|> Subscription
    yourSubscription --* MqttConnectionManager : [0:N]

    struct yourActor #white
    yourSubscription -> yourActor: can call

    struct "your Handler <Handler<yourMessage>>" as message

    MqttPublisher ..|> message : implement [0:N]
    yourActor --> message: can call
@enduml