remove method
removes the entry at position key. Returns the entry or null
Implementation
@override
CacheEntry<K, V>? remove(K key) {
CacheEntry<K, V>? oldEntry = _internalMap[key];
if (oldEntry != null && oldEntry.value != null && onEvict != null) {
onEvict!(oldEntry.key, oldEntry.value!);
}
return _internalMap.remove(key);
}