Language servers such as typescript-language-servers report a single
work event, ending right after server's startup.
Other servers might send more similar event, also during startup.
The rest of the events are diagnostic-related and we filter them out.
React on such events with /refresh-like hint update, that will check
only the visible part of the editor for hints and might be replaced by
other /refresh requests, if needed.
Kirill Bulatov
0b0a161626