1 function call() { [native code] }
   2 func.call.length = 1
   3 hello, 
   4 world
   5 hello, 
   6 world
   7 hello, 
   8 world
   9 invokedynamic
  10  is great!
  11 func.apply.length = 2
  12 I am func2
  13 undefined
  14 undefined