pub unsafe extern "C-unwind" fn MACaptionAppearanceCopyBackgroundColor(
domain: MACaptionAppearanceDomain,
behavior: *mut MACaptionAppearanceBehavior,
) -> CFRetained<CGColor>Available on crate features
MACaptionAppearance and objc2-core-graphics only.Expand description
User preference for background color.
The background color is the color behind each caption glyph.
Parameter domain: Preference domain, see
MACaptionAppearanceDomain.
Parameter behavior: (see
MACaptionAppearanceBehavior)
Returns: User preference for background color.
ยงSafety
behavior must be a valid pointer or null.