public QuestionElementManager(string identifier, string text, ElementManagerCollection parent, ElementManagerController controller, ExpressionBool activationExpression = null, TypedExpressionValue <T> answerExpression = null) :
base(identifier, text, "question", parent, controller, activationExpression)
{
Answer = new QuestionElementValue <T>(default(T), false);
IsAnswered = false;
_answerExpression = answerExpression;
Editable = _answerExpression == null;
}
public ElementManagerLeaf(string identifier, string text, string xmlName, ElementManagerCollection parent, ElementManagerController controller, ExpressionBool activationExpression = null) :
base(identifier, text, xmlName, controller, activationExpression)
{
Parent = parent;
}