public function getLogs($level = null)
	{
		// If no level was given, return all logs.
		if(is_null($level))
		{
			return $this->logs;
		}

		else
		{
			if(isset($this->logs[$level]))
			{
				return $this->logs[$level];
			}
		}

		// If the level doesn't exist, just return an empty array.
		//
		// @todo: check that the level exists, otherwise throw an exception. 
		return array();
	}