@startuml
skin rose
skinparam BackgroundColor transparent
skinparam GenericDisplay old
skinparam Shadowing false
hide empty members

class action_animal as "Action<Animal>" << (D,orchid) >> {
    + Action(Animal)
}
class action_dog as "Action<Dog>" << (D,orchid) >> {
    + Action(Dog)
}
class action_cat as "Action<Cat>" << (D,orchid) >> {
    + Action(Cat)
}

action_dog <|-[#blue]- action_animal
action_cat <|-[#blue]- action_animal

@enduml