how can i get the last row with a given foreign key in yii2 with relations?

i have 2 tables

tickets:
-id
etc..

comments:
-id
-ticket_id
-datetime
etc...

ticket_id is the ticket’s id on which the comment was made.

one ticket can have 0 or more comments in this way

how should i go about creating a relation in my Ticket model, to fetch it’s last comment?

part of my Ticket Model:

class Ticket extends ActiveRecord
{
public function getComments(): ActiveQuery
    {
        return $this->hasMany(Comment::class, ['ticket_id' => 'id']);
    }

    public function getHandler(): ActiveQuery
    {
        return $this->hasOne(User::class, ['id' => 'handler_id']);
    }

    public function getLastComment()
    {
        //???
    }
}