Items: basic implementations of basic interfaces (blanks)
test for MultiContainer
Items\MultiContainer: The basic implementation of the IMultiContainer interface
Items\LocalContainer: The basic implementation of the ILocalContainer interface
Items\MultiContainer::getStorage(): Get the instance of storage
Items\MultiType: The basic implementation of the IMultiType interface (partial)
Items\Storage\DB: The basic class for databases implementations of IStorage
Items\Storage\DB: + use the readonly parameter