* <p>
     * Notifies any listeners if the model changes.
     *
     * @param  newExtent the model's new extent
     * @see #getExtent
     * @see #setValue
     */
    void setExtent(int newExtent);



    /**
     * This method sets all of the model's data with a single method call.
     * The method results in a single change event being generated. This is
     * convenient when you need to adjust all the model data simultaneously and
     * do not want individual change events to occur.
     *
     * @param value  an int giving the current value 
     * @param extent an int giving the amount by which the value can "jump"
     * @param min    an int giving the minimum value
     * @param max    an int giving the maximum value
     * @param adjusting a boolean, true if a series of changes are in
     *                    progress
     * 
     * @see #setValue
     * @see #setExtent
     * @see #setMinimum
     * @see #setMaximum
     * @see #setValueIsAdjusting
     */
    void setRangeProperties(int value, int extent, int min, int max, boolean adjusting);


    /**
     * Adds a ChangeListener to the model's listener list.
     *
     * @param x the ChangeListener to add
     * @see #removeChangeListener
     */
    void addChangeListener(ChangeListener x);


    /**
     * Removes a ChangeListener from the model's listener list.
     *
     * @param x the ChangeListener to remove
     * @see #addChangeListener
     */
    void removeChangeListener(ChangeListener x);

}