Bug 147687 Assert err happened with design ui
Run BIRT in workbench with argument -ea. Assert err happened when using design ui to open a design file.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/command/WrapperCommandStack.java
*/
	public void addCommandStackListener( CommandStackListener listener )
	{
		
		assert false;
	}
	/*
	 * Do not use, use removeCommandStackListener(ActivityStackListener) instead
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.CommandStack#removeCommandStackListener(org.eclipse.gef.commands.CommandStackListener)
	 */
	public void removeCommandStackListener( CommandStackListener listener )
	{
		
		assert false;
	}
	public void setActivityStack( CommandStack ar )
	{
		this.ar = ar;
	}
	public void dispose( )
	{
		
		super.dispose( );
		ar.flush();
		ar.clearListeners();
		ar = null;
	}
}