pub extern "C-unwind" fn CFAttributedStringCreateMutableCopy(
alloc: Option<&CFAllocator>,
max_length: CFIndex,
a_str: Option<&CFAttributedString>,
) -> Option<CFRetained<CFMutableAttributedString>>👎Deprecated: renamed to
CFMutableAttributedString::new_copyAvailable on crate feature
CFAttributedString only.