docs: public DescribeGameSessionDetailsResult withGameSessionDetails(GameSessionDetail... gameSessionDetails) {
          if (this.gameSessionDetails == null) {
              setGameSessionDetails(new java.util.ArrayList<GameSessionDetail>(gameSessionDetails.length));
          }
          for (GameSessionDetail ele : gameSessionDetails) {
              this.gameSessionDetails.add(ele);
          }
          return this;
      }