description

# forEach method Null safety

void forEach (

1. void f(
   1. K key,
   2. V value
   )

)
override

Applies `f` to each key/value pair of the map.

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

## Implementation

    void forEach(void f(K key, V value)) {
      Iterator<_SplayTreeMapNode<K, V>> nodes =
          _SplayTreeNodeIterator<K, _SplayTreeMapNode<K, V>>(this);
      while (nodes.moveNext()) {
        _SplayTreeMapNode<K, V> node = nodes.current;
        f(node.key, node.value);
      }
    }