A Boolean value indicating whether the cell provides a visual indication that it is the first responder.
- macOS 10.0+
When the value of this property is
true and the cell becomes the first responder, the cell performs additional drawing to indicate that it is the first responder. The
NSCell class itself does not draw a first-responder indicator. Subclasses may use the value in this property to determine whether or not they should draw one.