public State::delete($key) Deletes an item.

State::__construct(KeyValueFactoryInterface $key_value_factory)

public State::get($key, $default = NULL) Returns

Provides the state system using a key value store. Hierarchy class \Drupal\Core\State\

public StateInterface::setMultiple(array $data)

Defines the interface for the state system. Hierarchy interface \Drupal\Core\State\

public State::deleteMultiple(array $keys) Deletes

public State::set($key, $value) Saves a value for

public State::setMultiple(array $data) Saves key/value