EntityConversionMap::save

public function save()
{
	EntityConversionMapTable::upsert(
		array(
			'SRC_TYPE_ID' => $this->srcEntityTypeID,
			'DST_TYPE_ID' => $this->dstEntityTypeID,
			'DATA' => serialize($this->externalize())
		)
	);

	$key = "{$this->srcEntityTypeID}_{$this->dstEntityTypeID}";
	if(isset(self::$items[$key]))
	{
		unset(self::$items[$key]);
	}
}