public void Should_convert_name_model()
        {
            var input =
                new NamedContentData()
                .AddField("field1",
                          new ContentFieldData()
                          .AddValue("en", "EN"))
                .AddField("field2",
                          new ContentFieldData()
                          .AddValue("iv", 1))
                .AddField("invalid",
                          new ContentFieldData()
                          .AddValue("iv", 2));

            var actual = input.Convert(schema, (data, field) => field.Name == "field2" ? null : data);

            var expected =
                new NamedContentData()
                .AddField("field1",
                          new ContentFieldData()
                          .AddValue("en", "EN"));

            Assert.Equal(expected, actual);
        }