/// <summary>
		/// Creates a new code question updater.
		/// </summary>
		private static QuestionUpdater<Question> GetQuestionUpdater(
			TestDatabase database,
			CodeQuestion question,
			IModelErrorCollection errors)
		{
			return new Mock<QuestionUpdater<Question>>(database.Context, question, errors).Object;
		}
 /// <summary>
 /// Creates a new mock question duplicator.
 /// </summary>
 private static CodeQuestionDuplicator<CodeQuestion> GetCodeQuestionDuplicator(
     TestDatabase database,
     CodeQuestion question)
 {
     return new Mock<CodeQuestionDuplicator<CodeQuestion>>(database.Context, question).Object;
 }