public function displayElement(element $element)
{
switch ($element->type()) {
case 'headlineElement':
$this->displayHeadline($element);
break;
case 'textElement':
$this->displayText($element);
break;
case 'imageElement':
$this->displayImage($element);
break;
default:
$errormsg = 'Unknown element type: ' . htmlentities($element->type());
trigger_error($errormsg, E_USER_WARNING);
}
}