Reeti V2 uses Urbi 3.0
Documentation for Urbi sdk 3.0 is not available.
Main difference in urbi 3.0 is that the call of urbi functions without any argument now requires explicite brackets : "()".
You can also refer directly to Urbi repository : https://github.com/aldebaran/urbi
Reeti V1 uses Urbi 2.6 :