using SurveyLib.Core.Models; namespace SurveyLib.Core.Services; public interface IAnswerVariantsService { Task AddAnswerVariantAsync(AnswerVariant answerVariant); Task UpdateAnswerVariantAsync(AnswerVariant answerVariant); Task DeleteAnswerVariantAsync(int id); Task GetAnswerVariantByIdAsync(int id); Task> GetAnswerVariantsByQuestionIdAsync(int questionId); }