How do I get parent key in custom email of scriptunner

Question

Hi,

I am using scriptrunner post function for custom email. 
I would want to get only the key from the issue's parent.

I tried this following : 
$issue.parent 
looks like it gives complete list of the attributes from parent

issue.getParentObject().getKey()
I am getting some syntax er.. do I have to use any import for this to work?

Thanks for your time to answer this.

Payne · Accepted Answer

$issue.parent.key

ought to do the trick.