export declare class PathHelper {
    static readonly DELIMITER: string;
    private static _getPaths;
    /**
     * Check if a path is absolute.
     * @param path
     */
    static isAbsolute(path: string): boolean;
    /**
     * Check if a path is a directory.
     * @param path
     */
    static isDirectory(path: string): boolean;
    /**
     * Check if a path is a file.
     * @param path
     */
    static isFile(path: string): boolean;
    /**
     * Get the basename (dirname or filename) of a path.
     * @param path
     */
    static basename(path: string): string;
    /**
     * Get the name of the directory of a file
     * @param path
     */
    static dirname(path: string): string;
    /**
     * Get the file extension of a path.
     * Extension will be transformed to lower case.
     * @param path
     */
    static extName(path: string): string;
    /**
     * Join multiple paths.
     * @param paths
     */
    static join(...paths: Array<string>): string;
    /**
     * Convert a number to a readable memory size.
     * @param size
     */
    static sizeString(size: number): string;
}