NumbersPatternPatchMutation.scala

class Numbers {
    def greaterThan(a: Int, b: Int): Boolean = {  
        sys.env.get("ACTIVE_MUTATION") match {  
            case Some("0") =>  
                a >= b  
            case Some("1") =>  
                a < b  
            case Some("2") =>  
                a == b  
            case _ =>  
                a > b  
        }
    }  
}