public function dissociate($type = null, $id = null)
{
$result = true;
$type_id = Vocabulary::object_type_id($type);
Plugins::act('term_dissociate_from_object_before', $this->id, $id, $type_id);
$result = DB::query("DELETE FROM {object_terms} WHERE term_id = ? AND object_id = ? AND object_type_id = ?", array($this->id, $id, $type_id));
Plugins::act('term_dissociate_from_object_after', $this->id, $id, $type_id, $result);
return $result;
}