[exim] Correct way to verify $dkim_verify_status

Hello,

I was looking for the best way to check the value of $dkim_verify_status
and came across this page:
https://www.exim.org/exim-html-current/doc/html/spec_html/ch-dkim_spf_srs_and_dmarc.html

Within it I see:
  warn condition       = ${if eq {$dkim_verify_status}{pass}}

Am I right in thinking this example would only return true if
$dkim_verify_status was "pass" and not "pass:pass" or "pass:pass:pass"?

If so, what is the best way to check for a $dkim_verify_status pass whether
singular or multiple?

Thanks,
Dominic.

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