content: sub fn(x, y)<fold text='...'>
      sub a(x, y) as Void<fold text='...'>
          end
      </fold>endsub
  
      mysub = sub()<fold text='...'>
          print "fred"
      </fold>endsub
  
      a("foo", "bar")
  </fold>end sub
  
  sub main()<fold text='...'> : print "exit" : </fold>endsub