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object Test{
def main(args : Array[String]): Unit = {
import scala.collection.immutable.TreeSet;
val mainSet = TreeSet(1 to 5 :_*)
var compareCalled = false;
val smallerSet = TreeSet(2 to 4 :_*)(Ordering[Int].reverse)
println(mainSet.mkString(","))
println(smallerSet.mkString(","))
println(smallerSet.subsetOf(mainSet));
}
}
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