$scope.lastFoundWord... what's it for?

[stevenharman]

I want to prevent kicking off a new search if there is a keyPressed, but the search term hasn't changed (think, you're just moving the cursor, or doing a CMD + A to select the text). In preparing to do this, I noticed a $scope.lastFoundWord variable, but don't see it being used anywhere. What's it for? Was it intended for something like this?