`withFilter' method does not yet exist on scala.collection.parallel.immutable.ParSet

[scabug]

Ack, so tired of this warning. Can backport that implementation to 2.10.x?

/*scala>*/ for (i <- List(1,2,3,4).par if i % 2 == 0) yield i 
//<console>:8: warning: `withFilter' method does not yet exist on scala.collection.parallel.immutable.ParSeq[Int], using `filter' method instead
//              for (i <- List(1,2,3,4).par if i % 2 == 0) yield i 
//                                      ^
//res0: scala.collection.parallel.immutable.ParSeq[Int] = ParVector(2, 4)

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-8968?orig=1
Reporter: @refried
Affected Versions: 2.10.4

[som-snytt]

2.10.6 or Obi-wan was the last hope.

On 2.11, amongst the removals: scala/scala@aced32d

[SethTisue]

note that testing this in the 2.12 or 2.13 REPL is likely to run afoul of scala/scala-dev#195

[som-snytt]

No fool I, -Yrepl-class-based.