trait Foo {
	def foo(x: Int): String
}
 
class FooDecorator(decorated: Foo) extends Foo {
	def foo(x: Int): String = s"${decorated.foo(2 * x)} decorated"
}
 
object Main extends App {
	val foo1 = new FooDecorator(new Foo {
		def foo(x: Int) = x.toString
	})
 
	println(foo1.foo(21))
 
	// or
 
	def fooDecorator(decorated: Int => String)(x: Int): String = s"${decorated(2 * x)} decorated"
 
	val foo2: Int => String = fooDecorator(_.toString)
 
	println(foo2(21))
}

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