Function SecCertificateCopyNormalizedIssuerSequence 

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

👎Deprecated: renamed to SecCertificate::normalized_issuer_sequence

Available on crate features SecBase and SecCertificate only.