copyItems<T>(fromPrefix: StorageKey,toPrefix: StorageKey,fromStore: StorageModule<T>,toStore?: MinimalStorageModule<T>,): Promise<void>
Default implementation of copyItems for stores that might not implement it, or for copying between stores.
fromPrefix: StorageKey
toPrefix: StorageKey
fromStore: StorageModule<T>
optional
toStore: MinimalStorageModule<T> = fromStore
Promise<void>