package org.joy.mjtreetable;import javax.swing.tree.TreeModel;public interface TreeTableModel extends TreeModel{    /**     * Returns the number ofs availible column.     */    public int getColumnCount();    /**     * Returns the name for column number <code>column</code>.     */    public String getColumnName(int column);    /**     * Returns the type for column number <code>column</code>.     */    public Class getColumnClass(int column);    /**     * Returns the value to be displayed for node <code>node</code>,      * at column number <code>column</code>.     */    public Object getValueAt(Object node, int column);    /**     * Indicates whether the the value for node <code>node</code>,      * at column number <code>column</code> is editable.     */    public boolean isCellEditable(Object node, int column);    /**     * Sets the value for node <code>node</code>,      * at column number <code>column</code>.     */    public void setValueAt(Object aValue, Object node, int column);}