public SplitJoinType WEIGHTED_ROUND_ROBIN (int w1, int w2)
public SplitJoinType WEIGHTED_ROUND_ROBIN (int w1)
    public SplitJoinType WEIGHTED_ROUND_ROBIN (int w1, int w2)    {        return new SplitJoinType (2).AddWeight (w1).AddWeight (w2);    }