public static String logPre(TenantName tenant) {
        if (DEFAULT_TENANT.equals(tenant)) return "";
        return "tenant:" + tenant.value() + " ";
    }
A helper to format a log preamble for messages with a tenant

@param tenant tenant
@return the log string
configserver/src/main/java/com/yahoo/vespa/config/server/tenant/TenantRepository.java