disp.setCurrent( next );
StyleSheet.display.setCurrent( next );
	public void commandAction(Command cmd, Displayable thisScreen) {		if (this.nextDisplayable == null) {			throw new IllegalStateException();		}		Displayable next = this.nextDisplayable;		Display disp = this.display;		this.display = null;		this.nextDisplayable = null;		disp.setCurrent( next );	}