private function getRadiusWithAddition(): ?SpellRadius
    {
        $baseSpellRadius = $this->tables->getFormulasTable()->getSpellRadius($this->formulaCode);
        if ($baseSpellRadius === null) {
            return null;
        }

        return $baseSpellRadius->getWithAddition($this->formulaSpellParameterChanges[FormulaMutableSpellParameterCode::SPELL_RADIUS]);
    }