private IEnumerable <FieldData> GetFieldData(IItemVariantIdentifier identifier, ItemModel itemModel)
{
var language = itemModel.GetLanguage(identifier.Language);
var version = language.GetVersion(identifier.Version);
var invariantFields = itemModel.Fields.Select(field => new FieldData(
field.Id,
identifier.Id,
field.Value,
VarianceInfo.Invariant));
var languageVariantFields = language.Fields.Select(field => new FieldData(
field.Id,
identifier.Id,
field.Value,
VarianceInfo.LanguageVariant(language.Language)));
var variantFields = version.Fields.Select(field => new FieldData(
field.Id,
identifier.Id,
field.Value,
VarianceInfo.Variant(language.Language, version.Number)));
return(invariantFields.Union(languageVariantFields).Union(variantFields));
}