typealias CacheTypeReducer

export type CacheTypeReducer<State extends CacheType, CachedType, RawType = CachedType, PresentType = CachedType | RawType, Fallback = PresentType | null,> = [State] extends ['cached'] ? CachedType : [State] extends ['raw']  ? RawType  : [State] extends ['cached' | 'raw']   ? PresentType   : Fallback;