NewEmptySyncList creates a new SyncList that holds no information.

NewListRefresher takes the given values and uses them to create a new listRefresher.

BlackListedItem is the regex that expresses the devices that are blacklisted and the reason why.

RefresherConfig is the configuration specifying how often to update the list and what logger to use when logging.

SyncList is an implemention of the List interface that works synchronously.

List is for checking if a device id is in the blacklist.

Updater is for getting the blacklist.