Function CFAttributedStringCreateWithSubstring 

pub unsafe extern "C-unwind" fn CFAttributedStringCreateWithSubstring(
    alloc: Option<&CFAllocator>,
    a_str: Option<&CFAttributedString>,
    range: CFRange,
) -> Option<CFRetained<CFAttributedString>>

👎Deprecated: renamed to CFAttributedString::with_substring

Available on crate feature CFAttributedString only.