object(MealIterator)#%d (2) {
  ["pos":"MealIterator":private]=>
  int(0)
  ["myContent":"MealIterator":private]=>
  array(3) {
    [0]=>
    string(9) "breakfast"
    [1]=>
    string(5) "lunch"
    [2]=>
    string(6) "dinner"
  }
}
-----( Simple iteration: )-----
--> MealIterator::rewind (0)
--> MealIterator::valid (0)
--> MealIterator::current (0)
--> MealIterator::key (0)
meal 0 => breakfast
--> MealIterator::next (0)
--> MealIterator::valid (1)
--> MealIterator::current (1)
--> MealIterator::key (1)
meal 1 => lunch
--> MealIterator::next (1)
--> MealIterator::valid (2)
--> MealIterator::current (2)
--> MealIterator::key (2)
meal 2 => dinner
--> MealIterator::next (2)
--> MealIterator::valid (3)
--> MealIterator::rewind (3)



-----( Nested iteration: )-----
 --> MealIterator::rewind (0)
 --> MealIterator::valid (0)
 --> MealIterator::current (0)
 --> MealIterator::key (0)

Top level 1: 
meal 0 => breakfast
     --> MealIterator::rewind (0)
     --> MealIterator::valid (0)
     --> MealIterator::current (0)
     --> MealIterator::key (0)
     meal 0 => breakfast
     --> MealIterator::next (0)
     --> MealIterator::valid (1)
     --> MealIterator::current (1)
     --> MealIterator::key (1)
     meal 1 => lunch
     --> MealIterator::next (1)
     --> MealIterator::valid (2)
     --> MealIterator::current (2)
     --> MealIterator::key (2)
     meal 2 => dinner
     --> MealIterator::next (2)
     --> MealIterator::valid (3)
 --> MealIterator::next (3)

Warning: Undefined array key 3 in %s on line %d
 --> MealIterator::valid (4)