Create a searcher for a custom field type

Hello team,
I created a new multiselect custom field type which extends AbstractMultiCFType in Jira. I need now to be able to search the field in the advanced issue searcher, that’s why I added a < customfield-searcher> tag in my atlassian-plugin.xml which calls a class named CompanySearcher.java. Since I can’t extend MultiSelecteSearcher (don’t want to untag jira-core), I figured that I need to write my own searcher. However, I didn’t find any documentation on how to do it. Do you guys have an idea ??
thank you!

Hey Guys,

I’m facing the same issue. Can you please help?

thanks,
Rosy

Would like as well to get references to documentation of this subject.