Interface EventManager<T>

interface EventManager<T = EventPayloadMap> {
    off<K extends string | number | symbol>(
        name: K,
        handler: EventHandler<T[K]>,
    ): void;
    on<K extends string | number | symbol>(
        name: K,
        handler: EventHandler<T[K]>,
        opts?: EventOptions,
    ): void;
    trigger<K extends string | number | symbol>(name: K, payload?: T[K]): void;
}