move method

void move(
  1. K oldKey,
  2. K newKey
)

Moves the element at the oldKey to the newKey replacing the existing element, if any.

No-op, if element at the oldKey doesn't exist.

Implementation

void move(K oldKey, K newKey) {
  V? v = super.remove(oldKey);

  if (v != null) {
    V? n = super[newKey];
    if (n != null && n != v) {
      _changes.add(MapChangeNotification<K, V>.removed(newKey, n));
    }

    super[newKey] = v;
    _changes.add(MapChangeNotification<K, V>.updated(newKey, oldKey, v));
  }
}