protected static function _relations() {
		$self = static::_object();

		if (!$self->_meta['connection']) {
			return;
		}

		foreach ($self->_relationTypes as $type => $keys) {
			foreach (Set::normalize($self->{$type}) as $name => $config) {
				static::bind($type, $name, (array) $config);
			}
		}
	}