Any good way to modify remote url file and debug it?

For example, I'm using

import server "https://deno.land/x/ultra@v2.1.7/server.ts"

import server "https://deno.land/x/ultra@v2.1.7/server.ts"

import server "https://deno.land/x/ultra@v2.1.7/server.ts"

import server "https://deno.land/x/ultra@v2.1.7/server.ts"
I want to modify this remote package and debug it with chrome or VScode.