Bitbucket server: Send email with file diffs using post-receive hook

[gataers]

In bitbucket, everytime new commits are made in my repository, I have set up a post-receive hook that emails the list of files which were changed. The recipients would then click see in stash to view these edited lines of code(through red colored '-' and green colored '+'). The mail currently looks like:

I simply used

 ${EmailUtil.displayAllCommits()}

 to do so, following the documentation here https://scriptrunner.adaptavist.com/5.0.9/bitbucket/PostReceiveHooks.html#_send_mail

Now I would like to send the edited lines of code in the mail iteself. Is it possible? I searched for the default templates, as I thought bitbucket should have provided this feature by default, but couldn't find anything. Any pointers in the right direction would be apprecited.