interface ShortcutSetStorageInterface

interface ShortcutSetStorageInterface extends ConfigEntityStorageInterface {
    
    /**
     * Assigns a user to a particular shortcut set.
     *
     * @param \Drupal\shortcut\ShortcutSetInterface $shortcut_set
     *   An object representing the shortcut set.
     * @param $account
     *   A user account that will be assigned to use the set.
     */
    public function assignUser(ShortcutSetInterface $shortcut_set, $account);
    
    /**
     * Un-assigns a user from any shortcut set they may have been assigned to.
     *
     * The user will go back to using whatever default set applies.
     *
     * @param $account
     *   A user account that will be removed from the shortcut set assignment.
     *
     * @return bool
     *   TRUE if the user was previously assigned to a shortcut set and has been
     *   successfully removed from it. FALSE if the user was already not assigned
     *   to any set.
     */
    public function unassignUser($account);
    
    /**
     * Delete shortcut sets assigned to users.
     *
     * @param \Drupal\shortcut\ShortcutSetInterface $entity
     *   Delete the user assigned sets belonging to this shortcut.
     */
    public function deleteAssignedShortcutSets(ShortcutSetInterface $entity);
    
    /**
     * Get the name of the set assigned to this user.
     *
     * @param \Drupal\user\Entity\User $account
     *   The user account.
     *
     * @return string
     *   The name of the shortcut set assigned to this user.
     */
    public function getAssignedToUser($account);
    
    /**
     * Gets the shortcut set to be displayed for a given user account.
     *
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The user account whose default shortcut set will be returned.
     *
     * @return \Drupal\shortcut\ShortcutSetInterface
     *   An object representing the default shortcut set.
     */
    public function getDisplayedToUser(AccountInterface $account) : ShortcutSetInterface;
    
    /**
     * Get the number of users who have this set assigned to them.
     *
     * @param \Drupal\shortcut\ShortcutSetInterface $shortcut_set
     *   The shortcut to count the users assigned to.
     *
     * @return int
     *   The number of users who have this set assigned to them.
     */
    public function countAssignedUsers(ShortcutSetInterface $shortcut_set);
    
    /**
     * Gets the default shortcut set for a given user account.
     *
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The user account whose default shortcut set will be returned.
     *
     * @return \Drupal\shortcut\ShortcutSetInterface
     *   An object representing the default shortcut set.
     */
    public function getDefaultSet(AccountInterface $account);

}