ModifierForOddEven

public class OddEvenLiModifier : IPartialElementModifier
{
    private readonly Func<AccessorDef, bool> _matches;
    private readonly Func<AccessorDef, EachPartialTagModifier> _modifierBuilder;

    private bool matches(AccessorDef accessorDef)
    {
        return accessorDef.ModelType.IsType<ProjectListModel>();
    }

    private EachPartialTagModifier modifier = (request, tag, index, count) =>
                                                  {
                                                      if ((index%2) == 0)
                                                          tag.AddClass("odd");
                                                      else
                                                          tag.AddClass("even");

                                                      if (index == 0)
                                                          tag.AddClass("first");

                                                      if (index == count - 1)
                                                          tag.AddClass("last");
                                                  };

    public EachPartialTagModifier CreateModifier(AccessorDef accessorDef)
    {
        var something =  matches(accessorDef) ? modifier : null;
        return something;

    }
}