docs: public DescribeMatchmakingConfigurationsResult withConfigurations(MatchmakingConfiguration... configurations) {
          if (this.configurations == null) {
              setConfigurations(new java.util.ArrayList<MatchmakingConfiguration>(configurations.length));
          }
          for (MatchmakingConfiguration ele : configurations) {
              this.configurations.add(ele);
          }
          return this;
      }