humanReadableEmailRecipientFilter(recipientFilter, allLabels, allTiers) {
        // Examples: "label:test"; "label:test,label:batch1"; "status:-free,label:test", "all"
        if (recipientFilter === 'all') {
            return 'All subscribers';
        }

        try {
            const parsed = nql(recipientFilter).parse();
            const strings = this.filterToString(parsed, allLabels, allTiers);
            return strings.join(', ');
        } catch (e) {
            logging.error(e);
            return recipientFilter;
        }
    }
@private Convert an email filter to a human readable string
@param {string} recipientFilter
@param {*} allLabels
@param {*} allTiers
@returns