* @return The calculated checksums, indexed by algorithms, never {@code null}.
     * @throws NullPointerException if passed in any parameter is {@code null}.
     * @throws IOException In case of any IO problem.
     */
    @Nonnull
    Map<ChecksumAlgorithm, String> calculate(@Nonnull Path file, @Nonnull Collection<ChecksumAlgorithm> algorithms)
            throws IOException;

    /**