Group by - alert composer

Summary:

I am adding an alert to send to an HR helpdesk email account, when employees' visas and passports are coming up for expiry.

I need to be able to group these but not sure of the condition required in order to do this so that the email account doesn't receive one for each person.

Content (please ensure you mask any confidential information):

This is the one used in the manager alert; is there one that groups all people meeting the condition regardless of manager so there's one table in one email for the HR helpdesk account to receive?

${AlertUtils.toString(AlertUtils.empManagerList(workers.PersonId).WorkEmail)}