How to tag a Button?

In many UI frameworks, the base UI element class (in XForms, a View) contains a .Tag property that allows a reference to an object be associated with the View. Is there an equivalent in Xamarin Forms?

My use case is the following:

• My Page constructs a collection of Buttons that are children of a StackLayout. The number of Buttons can vary at run time.
• Each Button is associated with a feature in the app and is bound to the same ICommand in the page's view model.
• I would like to associate (i.e. tag) each Button with a FeatureViewModel so that when the user clicks any button, the command (which takes a FeatureViewModel argument) is executed.

A workaround would be for the Page to maintain a mapping of Button to FeatureViewModels and have each button's Clicked handler execute the view model's ICommand, which seems cheesy.