úÎ E ÈNone?This is the magic bit that makes the data-stores global to the : entire program. Sure, it cheats a little, but who doesn't? ;Create a named key-value store, and then execute the given ) IO action within its extent. Calls to  can be > nested, and calling it again with the name of a data-store = that has already been initialized will cause the original 2 to be shadowed for the duration of the call to . ;Get a value from the given data-store, if it exists. If it  doesn't exist, obviously,  will be returned. 7Get a value from the given store, with a default if it  doesn' t exist. 'Put a value into the given data-store. *Delete a value from the given data-store.      io-storage-0.3System.IO.Storage withStoregetValuegetDefaultValueputValuedelValue globalPegbase Data.MaybeNothing ValueStore getPrimitive