FGameplayEffectModCallbackData ( const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & InEffectSpec, [FGameplayModifierEvaluatedData](API\Plugins\GameplayAbilities\FGameplayModifierEvaluatedData) & InEvaluatedData, [UAbilitySystemComponent](API\Plugins\GameplayAbilities\UAbilitySystemComponent) & InTarget )