Bug 166383 [Viewers] Provide Tabing from Editor to Editor
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/EditingSupport.java
* @return the CellEditor
	 */
	protected abstract CellEditor getCellEditor(Object element);
	/**
	 * Is the cell editable
	 * 
	 * @param element
	 *            the model element
	 * @return true if editable
	 */
	protected abstract boolean canEdit(Object element);
	/**
	 * Get the value to set to the editor
	 * 
	 * @param element
	 *            the model element
	 * @return the value shown
	 */
	protected abstract Object getValue(Object element);
	/**
	 * Restore the value from the CellEditor
	 * 
	 * @param element
	 *            the model element
	 * @param value
	 *            the new value
	 */
	protected abstract void setValue(Object element, Object value);
}