public static SurveyResultModel Create(Data.Semester s, string filter, Expression <Func <ResponseModel, bool> > filterExpression) =>
public static SurveyModel Create(Data.Semester s) =>
public static SurveyModel Create(Data.Semester s, string userId) =>
public static SemesterModel Create(Data.Semester s, Expression <Func <Data.Event, bool> > filter) =>