MarkupExtension.ProvideValue — Is the IServiceProvider actually used?

Question

I was going through some old code of mine and came across a hybrid IValueConverter / MarkupExtension class. It got me wondering if the IServiceProvider in the ProvideValue method was actually useful, and how it would be useful?

I see that IServiceProvider only has one method: GetService, which must be cast to the proper service type. I also looked at the MarkupExtension.ProvideValue MSDN page and it lists different types of services. I guess, I'm just wondering if any of those services are useful or should I just leave my method as it is?

Current Method:

public Object ProvideValue(IServiceProvider serviceProvider)
{
    return new MyConverter();
}

Basically, should I do the following:

public Object ProvideValue(IServiceProvider serviceProvider)
{
    var provider = serviceProvider as SomeType;

    if (provider == null) return new MyConverter();

    //Do something with the provider here?
}