/**
* @param Termin $termin
*/
public function addTermin(Termin $termin)
{
$id = $termin->getId();
if (!$id) {
$this->termine->add($termin);
} elseif (!$this->termine->containsKey($id)) {
$this->termine->set($id, $termin);
}
$termin->setPin($this);
}
