Function trust_dns_client::rr::rdata::sig::emit_pre_sig

pub fn emit_pre_sig(
    encoder: &mut BinEncoder<'_>, 
    type_covered: RecordType, 
    algorithm: Algorithm, 
    num_labels: u8, 
    original_ttl: u32, 
    sig_expiration: u32, 
    sig_inception: u32, 
    key_tag: u16, 
    signer_name: &Name
) -> Result<(), ProtoError>

specifically for outputting the RData for an RRSIG, with signer_name in canonical form