Where is the RaiseCanExecuteChanged() method in DelegateCommand?

[King Chan]

I was reading some thread and know that when using Telerik Control is better to use the DelegateCommand from telerik instead of the one from Prism.
So I created a DelegateCommand object from Telerik.Windows.Contros.DelegateCommand, but I don't see the method exists.

I also checked the documentation here as well, I don't see method defined.  Did I missed anything or I used wrong class?