Function CFStringCreateMutableWithExternalCharactersNoCopy 

pub unsafe extern "C-unwind" fn CFStringCreateMutableWithExternalCharactersNoCopy(
    alloc: Option<&CFAllocator>,
    chars: *mut u16,
    num_chars: CFIndex,
    capacity: CFIndex,
    external_characters_allocator: Option<&CFAllocator>,
) -> Option<CFRetained<CFMutableString>>

👎Deprecated: renamed to CFMutableString::with_external_characters_no_copy

Available on crate feature CFString only.