[jvm-packages] fix return type of setEvalSets (#4105)

2019-02-06 11:00:29 -08:00
parent ae3bb9c2d5
commit 325b16bccd
1 changed files with 2 additions and 1 deletions
--- a/jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/params/NonParamVariables.scala
+++ b/jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/params/NonParamVariables.scala
@@ -21,8 +21,9 @@ import org.apache.spark.sql.DataFrame
 trait NonParamVariables {
  protected var evalSetsMap: Map[String, DataFrame] = Map.empty

-  def setEvalSets(evalSets: Map[String, DataFrame]): Unit = {
+  def setEvalSets(evalSets: Map[String, DataFrame]): this.type = {
    evalSetsMap = evalSets
+    this
  }

  def getEvalSets(params: Map[String, Any]): Map[String, DataFrame] = {