An NSNumber object specifying a font feature selector such as common ligature off, traditional character shape, and so on. See “Font Features“ in ATSUI Programming Guide for predefined feature selectors.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)