[Feature or Documentation Request] How to get the list of completions at runtime?

[Lancelotbronner]

I'm making a REPL with System.CommandLine and so far it's going great. One thing missing is tab completion. Ideally I could do something like parser.GetCompletions("tic"). Is this currently possible?

It seems most of the things related to completions are internal. If it isn't currently possible, how easy would it be to work around it?

[Lancelotbronner]

I found out I had to parse it first which does make sense, in which case this is a documentation request for the Tab Completion page to add parser.Parse("commandline").GetCompletions().