hide empty members

skinparam class {
    BackgroundColor<<desc>> Cyan
    BackgroundColor<<ppt>> LightGreen
    BackgroundColor<<mi>> LightPink
    BackgroundColor<<role>> LightYellow
    BackgroundColor<<strategy>> White
    BackgroundColor<<api>> White
    BackgroundColor<<spi>> White
    BackgroundColor<<internal>> LightGrey
    BackgroundColor<<value>> White

    BackgroundColor<<entity>> LightGreen
    BackgroundColor<<viewmodel>> LightPink
    BackgroundColor<<mixin>> LightYellow
}
