@startuml
package "Tracker" #DDDDDD {

}
package "TrackerFeature" #DDDDDD {

}
package "TrackerSampler" #DDDDDD {

}
package "TrackerModel" #DDDDDD {

}
Tracker -> TrackerModel: create
Tracker -> TrackerSampler: create
Tracker -> TrackerFeature: create


@enduml