Is there a way to reroute go to definition destination in vscode?

[c3-yiting]

Hi Matt!

I am a beginner working on VS code extension. I am impressed by your amazing work on javascript/typescript language features. The go to definition feature is super cool.

I was wondering whether there is a way to reroute go to definition destination. Instead of jumping to a d.ts file, I hope to redirect to a file with customized extension (.cust). I am using DefinitionProvider now, but I hope to get the type information from d.ts file.

By the way, I saw your Reality Filters, which is fantastic.