public static bool ChangeEvaluationDateScopeIsValid(this FilledToolCoachee filledTool, DateTime evaluationDate)
{
return(AssertionConcern.IsSatisfiedBy(
AssertionConcern.AssertArgumentNotNull(evaluationDate, Errors.DateIsRequired),
AssertionConcern.AssertArgumentAreEquals(filledTool.EvaluationDate, DateTime.MinValue, Errors.StartDateIsRequired)
));
}
