Initialises a new store connection.
The filename that the store is located in.
Represents a key-value data store.
delete(string $key): boolean
Deletes an item from the data store.
The key of the item to delete.
Whether it was really deleted or not. Note that if it doesn't exist, then it can't be deleted. Note also that if a node is deleted before being persisted to disk, this will return false when in actuality it was deleted successfully.