forEach method

  1. @override
void forEach (void action(K key, V value))
override

Applies action to each key-value pair of the map in order of MRU to LRU.

Calling action must not add or remove keys from the map.

Implementation 

@override
void forEach(void action(K key, V value)) {
  var head = _head;
  while (head != null) {
    action(head.key, head.value);
    head = head.next;
  }
}