def crls(self):
        """
        A list of all cached asn1crypto.crl.CertificateList objects
        """

        if not self._allow_fetching:
            return self._crls

        output = []
        for issuer_serial in self._fetched_crls:
            output.extend(self._fetched_crls[issuer_serial])
        return output
A list of all cached asn1crypto.crl.CertificateList objects