/**
 * Memoizes the result of an async loader function.
 *
 * - The loader is only executed once.
 * - Concurrent callers share the same in-flight promise.
 * - Subsequent calls return the cached value.
 *
 * Example usage:
 *
 *   const getSomeData = memoize(async () => {
 *     return await loadSomethingExpensive();
 *   });
 *
 * Or just use:
 *
 *   const getSomeData = memoize(loadSomethingExpensive);
 *   ...
 *   // Slow in the first call, immediate in subsequent calls.
 *   const data = await getSomeData();
 *
 */
declare function memoize<T>(loader: () => Promise<T>): () => Promise<T>;

export { memoize };