Exists checks if entity of specified ID exists in storage.

Initialize is called by engine to initialize storage module.

ListEntityIDs returns all entity IDs in storage Return values can be large for common entity types.

Load loads entity data from storage.

Save saves entity data to storage.

Shutdown storage module.

ExistsCallbackFunc is the callback type of storage Exists.

ListCallbackFunc is the callback type of storage List.

LoadCallbackFunc is the callback type of storage Load.

SaveCallbackFunc is the callback type of storage Save.