/// <summary>
 /// Constructor
 /// </summary>
 /// <param name="worksheet"></param>
 /// <param name="address"></param>
 /// <param name="validationType"></param>
 /// <param name="itemElementNode"></param>
 internal ExcelDataValidationDateTime(ExcelWorksheet worksheet, string address, ExcelDataValidationType validationType, XmlNode itemElementNode)
     : base(worksheet, address, validationType, itemElementNode)
 {
     Formula  = new ExcelDataValidationFormulaDateTime(NameSpaceManager, TopNode, _formula1Path);
     Formula2 = new ExcelDataValidationFormulaDateTime(NameSpaceManager, TopNode, _formula2Path);
 }