AdminWaitSetResponse

[vladus06]

ver: Release 8.8.15_GA_3869.RHEL7_64_20190917004220 RHEL7_64 FOSS edition, Patch 8.8.15_P9.

i make request

use Zimbra\Admin\AdminApi;

$api = new AdminApi('https://_server_:7071/service/admin/soap');
$api->auth('_admin_user_', '_admin_pass_');

$waitset = $api->adminCreateWaitSet('all', true );

print_r
(   $api->adminWaitSet
    (
    $waitset->getWaitSetId(),
    '0' ,
    true,
    true,
    'all',
    100000
    )
);

response

Zimbra\Admin\Message\AdminWaitSetResponse Object
(
    [waitSetId:Zimbra\Admin\Message\AdminWaitSetResponse:private] => AllWaitSet-2e7cab58-1632-4ff3-9069-87690b40a85e
    [canceled:Zimbra\Admin\Message\AdminWaitSetResponse:private] =>
    [seqNo:Zimbra\Admin\Message\AdminWaitSetResponse:private] => 2209-1661441423641-1659686696-304511
    [signalledAccounts:Zimbra\Admin\Message\AdminWaitSetResponse:private] => Array
        (
            [0] => Zimbra\Mail\Struct\AccountWithModifications Object
                (
                    [id:Zimbra\Mail\Struct\AccountWithModifications:private] => 4
                    [mods:Zimbra\Mail\Struct\AccountWithModifications:private] => Array
                        (
                        )

                    [lastChangeId:Zimbra\Mail\Struct\AccountWithModifications:private] => 107870
                )

        )

    [errors:Zimbra\Admin\Message\AdminWaitSetResponse:private] => Array
        (
        )

    [requestId:Zimbra\Common\Struct\SoapResponse:private] =>

[mods: ...] array is empty. Why?

[mods:Zimbra\Mail\Struct\AccountWithModifications:private] => Array
                        (
                        )

I want to see what changes have taken place in the folders
Can you help me?