pub unsafe extern "C-unwind" fn CFStringCreateWithBytesNoCopy(
alloc: Option<&CFAllocator>,
bytes: *const u8,
num_bytes: CFIndex,
encoding: CFStringEncoding,
is_external_representation: bool,
contents_deallocator: Option<&CFAllocator>,
) -> Option<CFRetained<CFString>>Available on crate features
CFBase and CFString only.