Static kCTFontBaselineAdjustAttribute 

pub unsafe static kCTFontBaselineAdjustAttribute: &'static CFString

Available on crate feature CTFontDescriptor only.

kCTFontBaselineAdjustAttribute

The baseline adjustment to apply to font metrics.

The value for this key is a floating-point CFNumberRef. This is primarily used when defining font descriptors for a cascade list to keep the baseline of all fonts even.

See also Apple’s documentation