Function SecCertificateCopyNormalizedSubjectSequence 

pub unsafe extern "C-unwind" fn SecCertificateCopyNormalizedSubjectSequence(
    certificate: &SecCertificate,
) -> Option<CFRetained<CFData>>

👎Deprecated: renamed to SecCertificate::normalized_subject_sequence

Available on crate features SecBase and SecCertificate only.