This is a question specifically about the Adapativist ScriptRunner "Custom Field" of type "Database Picker". (This question is here because the Adaptavist documentation specifically says questions about the plugin should be posted in this community)
I am attempting to follow documentation as laid out here:
https://scriptrunner.adaptavist.com/6.6.0/jira/script-fields/database-picker.html#customisations
For design reasons, my team and I want to use the 'Configuration Script' field of the Database picker to override the search and validate options on this fields.
We have implemented our 'getSearchSql' and related functions in the Configuration Script as recommended in the documentation. HOWEVER, when I try to preview our custom functions, I get the following:

Now, we have DELIBERATELY left these blank because we override them in the Configuration Script field. The form doesn't care.
So my question is:
1. Is this a bug or a feature?
2. What goes in the boxes such that they will be ignored in favor of our custom script?
This MUST be possible- there are example snippets that perform this override. But I can't make it work with my code setup.