[Koha-devel] ISSUESLIP and old_checkouts in template code

I'm trying to access old_checkouts in an ISSUESLIP like this: [% FOREACH checkout IN old_checkouts %] This seems to return an empty list, which is not surprising given that the ISSUESLIP supposedly doesn't get passed the old_checkouts variable, according to the wiki: https://wiki.koha-community.org/wiki/Notices_with_Template_Toolkit I've been trying to figure out how to get old_checkouts passed to ISSUESLIP, but I'm not too familiar with the code. As best as I can tell, this needs to be done somewhere in C4/Members.pm, perhaps in the IssueSlip function, but it's not clear to me what I need to do. Any guidance would be appreciated. Thanks in advance!