public function getLeagueGrandmaster( string $game_queue_type )
	{
		$resultPromise = $this->setEndpoint("/lol/league/" . self::RESOURCE_LEAGUE_VERSION . "/grandmasterleagues/by-queue/{$game_queue_type}")
			->setResource(self::RESOURCE_LEAGUE, "/grandmasterleagues/by-queue/%s")
			->makeCall();

		return $this->resolveOrEnqueuePromise($resultPromise, function(array $result) {
			return new Objects\LeagueListDto($result, $this);
		});
	}