[dimarik]

Ага, проверил. Во Flex можно воспользоваться конструкцией кастинга или конвертации.
Class(Season) или Season as Class. Либо в общем случае Object(Season) или Season as Object.

package {
    Class(Season);
}

package {
    class SecondSeason {
        Season as Class;
    }
}