function apply(Elite_Vaf_Model_Vehicle $descendant)
{
$titles = $descendant->toTitleArray();
$levelsToReplace = $this->getSchema()->getPrevLevelsIncluding($this->grain);
foreach ($levelsToReplace as $levelToReplace) {
$replacementTitle = $this->vehicle()->getLevel($levelToReplace)->getTitle();
$titles[$levelToReplace] = $replacementTitle;
}
foreach ($this->newTitles as $replacementTitle) {
$titles[$this->grain] = $replacementTitle;
$new_vehicle = Elite_Vaf_Model_Vehicle::create($this->getSchema(), $titles);
$new_vehicle->save();
$this->mergeFitments($descendant, $new_vehicle);
}
}
