Application programming interface for creating customized DataStore file subsystems.

## Package Specification

The package provides support classes for creating customized DataStore file subsystems.

The class DStoreFileSubSystemConfiguration is the main factory for creating an DataStore file subsystem. By deriving from it, extenders can create their customized DataStore file subsystem configuration which can then be registered against their system types. A custom SubSystemConfigurationAdapter can be registered for UI-specific customizations. Possible customizations include:

- Changing the isCaseSensitive() method for system types that are not of UNIX style.
- Registering pre-defined filters through a filter pool manager.
- Wrapping the created FileServiceSubSystem or DStoreFileService in a delegate for modifying operation of the Subsystem.