private ArrayContainer <TNestedField> createNestedContainer <TNestedField>(
SingleContainer <TField> container, Func <TField, IEnumerable <TNestedField> > selector, string newUpdateString)
{
var newUpdateStrings = container.UpdateStrings.Concat(new[] { newUpdateString });
var newItems = selector(container.Item);
return(new ArrayContainer <TNestedField>(newItems, newUpdateStrings));
}
private SingleContainer <TNestedField> createNestedContainer <TNestedField>(
SingleContainer <TField> container, Func <TField, TNestedField> selector, string newUpdateString)
{
var newUpdateStrings = container.UpdateStrings.Concat(new[] { newUpdateString });
var newItem = selector(container.Item);
return(new SingleContainer <TNestedField>(newItem, newUpdateStrings));
}