nsIDirectoryService Interface

 init

 Must be called. Used internally by XPCOM initialization.

void init()

 registerProvider

 Register a provider with the service.

 @param prov            The service will keep a strong reference
                        to this object. It will be released when
                        the service is released.

void registerProvider(in nsIDirectoryServiceProvider prov)

 unregisterProvider

 Unregister a provider with the service.

 @param prov            

void unregisterProvider(in nsIDirectoryServiceProvider prov)