public void GetFieldName_Test()
{
var itm = new CustomItem();
var fieldName = itm.GetFieldName(ci => ci.Тыдыщ);
Assert.That(fieldName, Is.EqualTo("_x0422__x044b__x0434__x044b__x04"));
fieldName = Item.GetFieldName <CustomItem>(c => c.Тыдыщ);
Assert.That(fieldName, Is.EqualTo("_x0422__x044b__x0434__x044b__x04"));
}