RegisterFileDevice
KFileDiskDevice *RegisterFileDevice(const char *filePath);
partition_id RegisterFileDevice(const char* filename);
partition_id id = roster.RegisterFileDevice(fileName);
partition_id id = roster.RegisterFileDevice(fileName);
partition_id id = roster.RegisterFileDevice(fPath);
id = roster.RegisterFileDevice(path.Path());
if (KFileDiskDevice* device = RegisterFileDevice(filePath)) {
KFileDiskDevice* device = manager->RegisterFileDevice(path.Path());
partition_id id = roster.RegisterFileDevice(kTestFileDevice);