1 files changed, 5 insertions, 5 deletions
diff --git a/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala b/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
index aa27a668f1..d7dee8fed2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
@@ -117,12 +117,12 @@ class AttributeGroup private (
         case numeric: NumericAttribute =>
           // Skip default numeric attributes.
           if (numeric.withoutIndex != NumericAttribute.defaultAttr) {
-            numericMetadata += numeric.toMetadata(withType = false)
+            numericMetadata += numeric.toMetadataImpl(withType = false)
           }
         case nominal: NominalAttribute =>
-          nominalMetadata += nominal.toMetadata(withType = false)
+          nominalMetadata += nominal.toMetadataImpl(withType = false)
         case binary: BinaryAttribute =>
-          binaryMetadata += binary.toMetadata(withType = false)
+          binaryMetadata += binary.toMetadataImpl(withType = false)
       }
       val attrBldr = new MetadataBuilder
       if (numericMetadata.nonEmpty) {
@@ -151,7 +151,7 @@ class AttributeGroup private (
   }
 
   /** Converts to ML metadata */
-  def toMetadata: Metadata = toMetadata(Metadata.empty)
+  def toMetadata(): Metadata = toMetadata(Metadata.empty)
 
   /** Converts to a StructField with some existing metadata. */
   def toStructField(existingMetadata: Metadata): StructField = {
@@ -159,7 +159,7 @@ class AttributeGroup private (
   }
 
   /** Converts to a StructField. */
-  def toStructField: StructField = toStructField(Metadata.empty)
+  def toStructField(): StructField = toStructField(Metadata.empty)
 
   override def equals(other: Any): Boolean = {
     other match {