A Boolean value indicating whether the cell draws itself outlined with a plain border.
- macOS 10.0+
The value of this property is
YES if the cell has a plain border or
NO if it does not. This property is mutually exclusive with the
bezeled property—that is, a cell’s border can be plain or bezeled but not both. Changing the value of this property automatically removes any bezel that has been set, regardless of the value you assign to the property.