You should not install this until you are told.
void function AddCallback_PlayerLeveledUp( void functionref(int gen, int level, int unlockId1 = -1, int unlockId2 = -1, int unlockId3 = -1) callbackFunc )
void function AddCallback_PlayerChallengeCompleted( void functionref( int refGuid, int parentRefGuid ) callbackFunc )