{"textDocument": {"uri": "file:///completionAtPrint.lean"},
 "position": {"line": 2, "character": 10}}
{"items":
 [{"label": "gg",
   "kind": 21,
   "data": ["file:///completionAtPrint.lean", 2, 10, 0, "cf.gg"]}],
 "isIncomplete": false}
Resolution of gg:
{"label": "gg",
 "kind": 21,
 "detail": "Nat",
 "data": ["file:///completionAtPrint.lean", 2, 10, 0, "cf.gg"]}