getRatings start and count argument not taken into account in SeparatePageRatingsManager

/**
     * Gets a list of ratings
     * 
     * @param documentRef the document to which the ratings belong to
     * @param start the offset from where to fetch the ratings
     * @param count how many ratings to fetch
     * @param asc sort the results in ascending order or not
     * @return a list of Rating objects
     * @throws RatingsException when an error occurs while fetching the list of ratings
     */
    List<Rating> getRatings(DocumentReference documentRef, int start, int count, boolean asc) throws RatingsException;