Thank you for contacting us.
Unfortunately, there is no such property in the current implementation of the control. You will have to bind to the already filtered collection.
If you have any other questions about our controls please let us know.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items