Merge "Documentation based on API council feedback."

     * substantial changes, and that data should be rescanned.

     * <p>

     * No other assumptions should be made about the meaning of the version.

     *

     * @param volumeName specific volume to obtain an opaque version string for.

     *            Must be one of the values returned from

     *            {@link #getAllVolumeNames(Context)}.

     */

    public static @NonNull String getVersion(@NonNull Context context, @NonNull String volumeName) {

        final ContentResolver resolver = context.getContentResolver();