CTFontDescriptorCreateCopyWithVariation

core_text::font_descriptor

Function CTFontDescriptorCreateCopyWithVariation 

Source 
pub unsafe extern "C" fn CTFontDescriptorCreateCopyWithVariation(
    original: CTFontDescriptorRef,
    variationIdentifier: CFNumberRef,
    variationValue: CGFloat,
) -> CTFontDescriptorRef