// Classes didn't care but functions do IG? ... O_O
// Re: https://pastebin.com/wzvwjvDg

scala> def foo = println("hi")
foo: Unit

scala> foo
hi

scala> foo()
          ^
       error: Unit does not take parameters

scala> def foo() = println("wait, what")
foo: ()Unit

scala> foo()
wait, what

scala> foo
wait, what