Add a search box that can be filter files by File Contents

Hello.I have thousands of jupyter files and I want to make a search into my jupyter file directory by jupyter notebook contents.

I do some search on google and find "tree-filter" extension which adds a search box on your jupyter directory and search into jupyter directory by file names, not by file contents.Is there any jupyter extension to search jupyter file contents?
For example, I want to search following code in my jupyter files:
`with open('exampledata.csv') as csvfile:`
How can I do that?Is there any available feature to do that?

The issue names no source files, tests, or entry points. First determine whether content search is already supported and identify the directory UI and notebook-search components involved; completion would require a defined scope and acceptance criteria for searching notebook contents.

Written by the indexing model from the issue text.