scala> import To._
import To._

scala> val f: Int => Int = _ + 1
f: Int => Int = <function1>

scala> f.toJava
res0: To.Function[Integer,Integer] = To$$anon$3$$anonfun$to$2$$anon$4@583f2b6b

scala> res0.toScala
res1: Int => Int = <function1>