8    $renderer = 
$DIC->ui()->renderer();
 
   10    $image = 
$factory->image()->responsive(
"./templates/default/images/HeaderIcon.svg", 
"Thumbnail Example");
 
   11    $card = 
$factory->card()->standard(
"Title", $image)->withSections(array(
$factory->legacy(
"Hello World, I'm a card")));
 
   12    $popover = 
$factory->popover()->standard($card)->withTitle(
'Card');
 
   13    $button = 
$factory->button()->standard(
'Show Card', 
'#')
 
   14        ->withOnClick($popover->getShowSignal());
 
   16    return $renderer->render([$popover, $button]);
 
An exception for terminatinating execution or to throw for unit testing.