Interface Storage

Removes all key/value pairs, if any, that match the given key.

Returns the current value associated with the given key, or null if the given key does not exist.

Returns all keys currently stored in the storage.

Removes the key/value pair with the given key, if a key/value pair with the given key exists.

Sets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.