fix mima

Author: mgaido91

project/MimaExcludes.scala

@@ -36,6 +36,8 @@ object MimaExcludes {
 
   // Exclude rules for 3.0.x
   lazy val v30excludes = v24excludes ++ Seq(
+    // [SPARK-25959] GBTClassifier picks wrong impurity stats on loading
+    ProblemFilters.exclude[IncompatibleResultTypeProblem]("org.apache.spark.ml.classification.GBTClassificationModel.setImpurity"),
     // [SPARK-25737] Remove JavaSparkContextVarargsWorkaround
     ProblemFilters.exclude[MissingTypesProblem]("org.apache.spark.api.java.JavaSparkContext"),
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.api.java.JavaSparkContext.union"),