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<?php
namespace Drupal\Core\State;
/**
* Defines the interface for the state system.
*
* @ingroup state_api
*/
interface StateInterface {
/**
* Returns the stored value for a given key.
*
* @param string $key
* The key of the data to retrieve.
* @param mixed $default
* The default value to use if the key is not found.
*
* @return mixed
* The stored value, or NULL if no value exists.
*/
public function get($key, $default = NULL);
/**
* Returns the stored key/value pairs for a given set of keys.
*
* @param array $keys
* A list of keys to retrieve.
*
* @return array
* An associative array of items successfully returned, indexed by key.
*/
public function getMultiple(array $keys);
/**
* Saves a value for a given key.
*
* @param string $key
* The key of the data to store.
* @param mixed $value
* The data to store.
*/
public function set($key, $value);
/**
* Saves key/value pairs.
*
* @param array $data
* An associative array of key/value pairs.
*/
public function setMultiple(array $data);
/**
* Deletes an item.
*
* @param string $key
* The item name to delete.
*/
public function delete($key);
/**
* Deletes multiple items.
*
* @param array $keys
* A list of item names to delete.
*/
public function deleteMultiple(array $keys);
/**
* Resets the static cache.
*
* This is mainly used in testing environments.
*/
public function resetCache();
}