Create multiple subtasks: possible to inherit the summary and key of the parent?

[Sandra Meessen]

Hello, I'm defining a template to create multiple subtasks, which are created by selecting "create multiple subtasks" from the parent issueview. I use the add-on "Quick subtasks". The documentation states :

I would like my summary of the subtask to be concatenated summary of the parent + "AT" + key of the parent. So something like "@summary AT @key". How do I do this? 

Thank you for the help!