// Get the importance of a feature. public unsafe double[] GetFeatureImportance(int numIteration, ImportanceType importanceType) { // Get the number of features int cnt = this.NumFeatures; double[] res = new double[cnt]; fixed (double* ptr = res) PInvokeException.Check(PInvoke.BoosterFeatureImportance(Handle, numIteration, (int)importanceType, ptr), nameof(PInvoke.BoosterFeatureImportance)); return res; }