Interface Serializable

Serializable
- SplDoublyLinkedList implements Iterator, Countable, ArrayAccess, Serializable
  - SplQueue
- SplObjectStorage implements Countable, Iterator, Serializable, ArrayAccess

Methods
`public`	`serialize(): string\|null` Implemented by `SplDoublyLinkedList::serialize()` `SplObjectStorage::serialize()`	#
`public`	`unserialize(string $data): void` Implemented by `SplDoublyLinkedList::unserialize()` `SplObjectStorage::unserialize()`	#