pub fn fn_chain_append_certificate_entry(
cert: &CertificateEntry,
chain: &Vec<CertificateEntry>,
) -> Result<Vec<CertificateEntry>, FnError>
pub fn fn_chain_append_certificate_entry(
cert: &CertificateEntry,
chain: &Vec<CertificateEntry>,
) -> Result<Vec<CertificateEntry>, FnError>