ItemPropertyBonusSavingThrowVsX

From NWN2Wiki

// Returns Item property saving throw bonus vs. a specific effect or damage type.
// You must specify the save type constant(IP_CONST_SAVEVS_*) that the bonus is
// applied to and the bonus that is be applied.  The bonus must be an integer 
// between 1 and 20.
itemproperty ItemPropertyBonusSavingThrowVsX(int nBonusType, int nBonus);

Note: It is not clear why the values for IP_CONST_SAVEVS_* are not aligned with SAVING_THROW_* for those values which are common to both. It is also unclear why ItemPropertyBonusSavingThrow() was not sufficient to cover all saving throws when its signature is identical to this function.