1 setting prop1: 1
   2 prop 1: 1
   3 prop 2: 1
   4 global toString 1
   5 [object Object]
   6 false
   7 true
   8 global toString 2
   9 [object Object]
  10 false
  11 true
  12 global toString 3
  13 [object Object]
  14 false
  15 true
  16 3
  17 5
  18 get [object o]
  19 4
  20 set [object o] 5
  21 get [object o]
  22 4
  23 true
  24 5
  25 3
  26 false
  27 get [object o]
  28 4
  29 get [object p]
  30 4