public function addDescription(Description $description)
{
if (!$description instanceof ThingDescription) {
if ($description instanceof Conjunction) {
// absorb sub-conjunctions
foreach ($description->getDescriptions() as $subdesc) {
$this->m_descriptions[] = $subdesc;
}
} else {
$this->m_descriptions[] = $description;
}
// move print descriptions downwards
///TODO: This may not be a good solution, since it does modify $description and since it does not react to future changes
$this->m_printreqs = array_merge($this->m_printreqs, $description->getPrintRequests());
$description->setPrintRequests(array());
}
}