NamedPageViewTracker.cs

public interface IPageViewTracker
{
    IDisposable Track(Page page);
}

public class NamedPageViewTracker : IPageViewTracker
{
    public NamedPageViewTracker(
        IPageViewTracker innerTacker, IPageViewNameProvider provider)
    {
        if (innerTacker == null)
            throw Error.That.ArgumentNull(nameof(innerTacker));

        if (provider == null)
            throw Error.That.ArgumentNull(nameof(provider));

        InnerTacker = innerTacker;
        Provider = provider;
    }

    public IPageViewTracker InnerTacker { get; }

    public IPageViewNameProvider Provider { get; }

    public IDisposable Track(Page page)
    {
        if (Provider.GetPageViewName(page) == null)
            return Disposable.Empty;

        return InnerTacker.Track(page);
    }
}