In the Java language server, we can open classfiles with source attachment in the editor. It uses virtual documents with our own uri scheme. (e.g. jdt://contents/rt.jar/java.io/PrintStream.class).

We would like the debugger's stackframe location to return that uri too.
However, current debug protocol always expects file path. See the debugSource.ts https://github.com/Microsoft/vscode/blob/master/src/vs/workbench/parts/debug/common/debugSource.ts

Ideally DebugProtocol.Source would also support a field uri that could be used instead of a path