virtual [FOnExternalGameplayModifierDependencyChange](API\Plugins\GameplayAbilities\FOnExternalGameplayModifierDepen-) * GetExternalModifierDependencyMulticast ( const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & Spec, [UWorld](API\Runtime\Engine\Engine\UWorld) * World ) const