private static bool UseNullInsteadOfDefaultValue(string dataType)
 {
     // For data types except numeric and boolean ones we need to use null value instead of default one
     // To avoid usage of Guid.Empty for Guid data type etc.
     return(!DataTypeManager.IsNumber(TypeEnum.Field, dataType) && !DataTypeManager.IsType <bool>(TypeEnum.Field, dataType));
 }