def XYZ():Unit={

var collector = Set[String]()
for ( x ← RDD )  {
   var str = checkValidity(x)
   if (str != "wrong") { collector+=str } else { println("do Nothing") }
   collector .foreach(x ⇒ println("Set printing in FOR =>" + x))
   }
   collector .foreach(x ⇒ println("Set printing in FUNC =>" + x))

}