[VSCode doc](https://code.visualstudio.com/docs/extensionAPI/vscode-api#RenameProvider) [Analysis Server doc - getRefactorings](https://htmlpreview.github.io/?https://github.com/dart-lang/sdk/blob/master/pkg/analysis_server/doc/api.html#request_edit.getAvailableRefactorings) [Analysis Server doc - getRefactoring](https://htmlpreview.github.io/?https://github.com/dart-lang/sdk/blob/master/pkg/analysis_server/doc/api.html#request_edit.getRefactoring)