Interface event7<T0, T1, T2, T3, T4, T5, T6, R>

interface event7<T0, T1, T2, T3, T4, T5, T6, R> {
    add(
        callback: (
            arg0: T0,
            arg1: T1,
            arg2: T2,
            arg3: T3,
            arg4: T4,
            arg5: T5,
            arg6: T6,
        ) => R,
    ): EventRegistration;
    remove(eventRegistration: EventRegistration): void;
}