{"textDocument": {"uri": "file:///completion7.lean"},
 "position": {"line": 6, "character": 10}}
{"items": [{"label": "And", "kind": 22, "detail": "Type 1"}],
 "isIncomplete": true}
{"textDocument": {"uri": "file:///completion7.lean"},
 "position": {"line": 8, "character": 11}}
{"items":
 [{"label": "left", "kind": 5, "detail": "And → Type"},
  {"label": "mk", "kind": 4, "detail": "Type → Type → And"},
  {"label": "right", "kind": 5, "detail": "And → Type"}],
 "isIncomplete": true}