1 files changed, 7 insertions, 12 deletions
diff --git a/src/library/scala/collection/parallel/mutable/ParSetLike.scala b/src/library/scala/collection/parallel/mutable/ParSetLike.scala
index 7c9767befd..68f142cda7 100644
--- a/src/library/scala/collection/parallel/mutable/ParSetLike.scala
+++ b/src/library/scala/collection/parallel/mutable/ParSetLike.scala
@@ -14,8 +14,8 @@ package parallel.mutable
 
 import scala.collection.mutable.Set
 import scala.collection.mutable.Builder
-import scala.collection.mutable.Cloneable
-import scala.collection.GenSetLike
+
+
 
 
 
@@ -35,21 +35,16 @@ import scala.collection.GenSetLike
 trait ParSetLike[T,
                  +Repr <: ParSetLike[T, Repr, Sequential] with ParSet[T],
                  +Sequential <: mutable.Set[T] with mutable.SetLike[T, Sequential]]
-extends GenSetLike[T, Repr]
+extends mutable.SetLike[T, Repr]
    with collection.parallel.ParIterableLike[T, Repr, Sequential]
    with collection.parallel.ParSetLike[T, Repr, Sequential]
-   with Cloneable[Repr]
-{
-self =>
-  override def empty: Repr
+{ self =>
 
-  def +=(elem: T): this.type
+  protected[this] override def newBuilder: Builder[T, Repr] = newCombiner
 
-  def -=(elem: T): this.type
+  protected[this] override def newCombiner: parallel.Combiner[T, Repr]
 
-  def +(elem: T) = this.clone() += elem
-
-  def -(elem: T) = this.clone() -= elem
+  override def empty: Repr
 
   // note: should not override toSet
 }