gistfile1.scala

class BooleanWrapper(var value:Boolean) {
  def ===(check:Boolean) = check == value
  def stop() = value = !value
}

class Person(isSad: BooleanWrapper = new BooleanWrapper(true)) {
  def sad() = isSad
  def beAwesome() { }
}

val person = new Person()

import person._

if (sad() === true) {
  sad().stop();
  beAwesome();
}