Function SecCertificateCopyCommonName 

pub unsafe extern "C-unwind" fn SecCertificateCopyCommonName(
    certificate: &SecCertificate,
    common_name: NonNull<*const CFString>,
) -> i32

👎Deprecated: renamed to SecCertificate::copy_common_name

Available on crate features SecBase and SecCertificate only.