BLE: What is the legacy API?
I've seen code like:
#ifdef BTLE_APP_USE_LEGACY_API
DmAdvInit();
DmConnInit();
DmConnSlaveInit();
#else /* BTLE_APP_USE_LEGACY_API */
DmExtAdvInit();
DmConnInit();
DmExtConnSlaveInit();
#endif /* BTLE_APP_USE_LEGACY_API */