@startuml

interface AppDesktopActionHandler
{
    handle(Action)
}

abstract class Action
{

}
class RequestPinAction
{
    GSM::SIM sim
    unsigned int attempts
}
class RequestPukAction
{
    GSM::SIM sim
    unsigned int attempts
}
class SimUnlockedAction
{
    GSM::SIM sim
}
class ChangePinAction
{
    GSM::SIM sim
}
class UnhandledCMEAction
{
    unsigned int cme_code
}
class SimBlockedAction
{
    GSM::SIM sim
}
Action <|-- RequestPinAction
Action <|-- RequestPukAction
Action <|-- SimUnlockedAction
Action <|-- ChangePinAction
Action <|-- UnhandledCMEAction
Action <|-- SimBlockedAction

AppDesktopActionHandler *-- Action : use

@enduml