FastTreeRanking doesn't have non-advanced args

[Zruty0]

Consider the following constructors:

        public FastTreeBinaryClassificationTrainer(IHostEnvironment env,
            string labelColumn,
            string featureColumn,
            string weightColumn = null,
            int numLeaves = Defaults.NumLeaves,
            int numTrees = Defaults.NumTrees,
            int minDocumentsInLeafs = Defaults.MinDocumentsInLeafs,
            double learningRate = Defaults.LearningRates,
            Action<Arguments> advancedSettings = null)

        public FastTreeRegressionTrainer(IHostEnvironment env,
            string labelColumn,
            string featureColumn,
            string weightColumn = null,
            int numLeaves = Defaults.NumLeaves,
            int numTrees = Defaults.NumTrees,
            int minDocumentsInLeafs = Defaults.MinDocumentsInLeafs,
            double learningRate = Defaults.LearningRates,
            Action<Arguments> advancedSettings = null)

        public FastTreeRankingTrainer(IHostEnvironment env, string labelColumn, string featureColumn, string groupIdColumn,
            string weightColumn = null, Action<Arguments> advancedSettings = null)

There is no reason to have disparity here: ranker should expose the same numLeaves, numTrees etc.

The only difference should be the presence of required groupId in the ranker constructor.

[feiyun0112]

@Zruty0
PR #1352 has fixed this issue

[shmoradims]

Yes, already fixed by PR #1352.