Select Code to Download

interface Aircraft {
    method set_pitch (...);
...
class Jet : isa Aircraft {
    method set_pitch (...) {...}
}

class Jet {
    method set_pitch (...) {...}
...
interface FlyingThings {
    require method set_pitch (...);
}

class Piano {
    method set_pitch (...) {...}
}

    ThickInterface    ThinInterface
            \        /
            ThickThin

unshift @ThickInterface::ISA, 'ThinInterface';