type Tuple<TItem = unknown> = TItem[] | readonly TItem[];

type CacheKey = Tuple;
/**
 * @experimental This is experimental feature.
 */
interface CacheOptions<TData, TCacheKey extends CacheKey> {
    cacheKey: TCacheKey;
    cacheFn: (options: {
        cacheKey: TCacheKey;
    }) => Promise<TData>;
}
declare const dataTagSymbol: unique symbol;
type DataTag<TType, TValue> = TType & {
    [dataTagSymbol]: TValue;
};

export { type CacheKey, type CacheOptions, type DataTag, dataTagSymbol };