Here's an extension that also addresses the need targeted by Show All Class Members. 

https://marketplace.visualstudio.com/items?itemName=georgejames.objects…

Thanks for creating this @Guillaume Rongier, and for your words of appreciation. It's a pleasure to see you joining the ranks of VS Code extension developers.

Anyone wanting to lobby for finalization of the VS Code API that will allow everyone to benefit from server-side search integrated into VS Code's native Search view without having to install a beta VSIX downloaded from our GitHub repo, please visit this 8-year-old VS Code issue and add your vote to the 👍on the initial post, i.e. here:

Let's see if we can move the dial on this.