Static kCTFontStyleNameAttribute 

pub unsafe static kCTFontStyleNameAttribute: &'static CFString

Available on crate feature CTFontDescriptor only.

kCTFontStyleNameAttribute

The style name.

This is the key for accessing the style name of the font. This name represents the designer’s description of the font’s style. The value associated with this key is a CFStringRef.

See also Apple’s documentation