Function CFNumberFormatterCreateStringWithNumber 

pub unsafe extern "C-unwind" fn CFNumberFormatterCreateStringWithNumber(
    allocator: Option<&CFAllocator>,
    formatter: Option<&CFNumberFormatter>,
    number: Option<&CFNumber>,
) -> Option<CFRetained<CFString>>

👎Deprecated: renamed to CFNumberFormatter::new_string_with_number

Available on crate features CFNumber and CFNumberFormatter only.