when conversion to a single parent class was done it re-introduced a
bug that was fixed a while ago
See commit d238ff7c5dbeb37657cf5980bcbe29fc2c82ffa2
Support for File System starage mode is retained, appropriate Storage
mode can be set by defining USE_FS_STORAGE for File System storage
aand US_FRAM_STORAGE for FRAM storage. Note: FS storage and FRAM
storage are never synced as of now.