Sorry for the delay but I just wanted to say thanks for your work on this!

I haven't had a chance to recompile with the latest support and try your LSP plugin, but after a quick glance a worthwhile thing for Dart/Flutter users that looks to be missing is "code actions".

Here is how it looks in VS Code in the context of Dart/Flutter - the Code Actions (under the refactor menu) allow quickly adding code for Flutters "widgets":


Aside from VS Code the only other editor I've seen with this implemented is Kate, where it is available in a right-click menu called "Code Action".

Eagerly awaiting the next release!