import * as Promise from "bluebird";
export declare function allDirectories(directory: string): Promise<Array<string>>;
export declare function permutations(array1: Array<any>, array2: Array<any>): Array<Array<any>>;
export declare function PromiseCache<Result>(func: () => Promise<Result>): () => Promise<Result>;
export declare function flatten<T>(arr: Array<Array<T>>): Array<T>;
export declare function canExecute(path: string): Promise<boolean>;