Thanks VSCode team for bringing this feature to the editor. I can't even mention how long I waited to see it in the next version of the Sublime Text (I still have hope) and the VSCode.
BTW why outline in IDEs is always in the different panel? Sometimes I feel like I would like to have an "org-mode" or a "workflowy" feel. I mean all references to classes, method, functions etc. displayed below the file in the sidebar. Then if I have errors or warning in hello() function I will be able to quickly find where I have a problem in my code - I need to only look on file list and I will see 2E bagde near src/main.c file and 1E at hello() and foo() functions. No need to lookup the 'Problems' panel anymore for quick fixes. And for markdown files it will be just like a table of contents.