forEach method Null safety

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

Applies action to each key/value pair of the map.

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

Implementation

void forEach(void action(K key, V value)) {
  for (K key in keys) {
    action(key, this[key] as V);
  }
}