{"title": "hello world",
 "kind": "quickfix",
 "edit":
 {"documentChanges":
  [{"textDocument": {"version": 0, "uri": "file://codeaction.lean"},
    "edits":
    [{"range":
      {"start": {"line": 17, "character": 4},
       "end": {"line": 17, "character": 4}},
      "newText": "hello!!!"}]}],
  "changes": {},
  "changeAnnotations": {}}}