public function has($alias, $far_keys = NULL)
	{
		$count = $this->count_relations($alias, $far_keys);
		if ($far_keys === NULL)
		{
			return (bool) $count;
		}
		else
		{
			return $count === count($far_keys);
		}
	}

3. relace with

	public function has($alias, $far_keys = NULL)
	{
		$count = $this->count_relations($alias, $far_keys);
		if ($far_keys === NULL)
		{
			return (bool) $count;
		}
		else
		{
            if (is_array($far_keys) OR $far_keys instanceof Countable)
            {
                $keys = count($far_keys);
            }
            else
            {
                $keys = 1;
            }

            return $keys === $count;
		}
	}