void forEach(void f(String key, String value))

Applies f to each key-value pair of the map.

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

Source

void forEach(void f(String key, String value)) {
  for (var i = 0; true; i++) {
    final key = _key(i);
    if (key == null) return;

    f(key, this[key]);
  }
}