type PromiseOrValue<T> = T | Promise<T>;
type IteratorFn<IN, OUT, COLLECTION = IN> = (item: Awaited<IN>, index: number, collection: COLLECTION) => OUT;
interface Options {
    concurrency?: number;
}
type ArrayCollection<T> = T[];
interface RecordCollection<T> extends Record<string, T> {
}
interface MapCollection<T> extends Map<string, T> {
}

export type { ArrayCollection, IteratorFn, MapCollection, Options, PromiseOrValue, RecordCollection };