IDE Auto Completion for keys

VSCode has autocompletion of key names for regular dictionaries (only 1 level down unfortunately). I am not quite sure how that works, but could it somehow be extended to dot notations?

Start by investigating VSCode’s existing one-level dictionary key completion and how Box’s dot notation is exposed; the issue names no repository files or tests. Determine whether dot-notation completion is feasible, then define and verify what support would count as complete in VSCode.

Written by the indexing model from the issue text.