Choose a Contact from Xamarin.Forms

Is there a way to click a Xamarin.Forms button that will open the iOS ABPeoplePickerNavigationController()? I'm trying to follow this link, and I'm stuck on how to reference the this.PresentModalViewController. Is there any instance of the PresentModalViewController from Xamarin.Forms that I can pass to iOS implementation?

FYI, I managed to create a DependencyService that will call a method in the iOS C# project.