Type Alias Evaluator<TResult, TEventMap>

Evaluator: {
    bivarianceHack(
        resolve: Resolver<TResult, TEventMap>,
        reject: Rejecter,
    ): void | Promise<void>;
}["bivarianceHack"]

Declared via the bivarianceHack indirection so the event map type parameter is bivariant; this lets a Bus over a wider event map satisfy a view over a narrower one (see Bus.scan).