operator [] method

V? operator [](K key)

Returns the value for key, or null if key is not in the cache.

Accessing an existing key marks it as the most recently used entry.

Implementation

V? operator [](K key) {
  if (!_cache.containsKey(key)) return null;

  // Move the accessed entry to the end (most recently used position).
  final value = _cache.remove(key);
  _cache[key] = value as V;
  return value;
}