{"textDocument": {"uri": "file:///completion.lean"},
 "position": {"line": 3, "character": 22}}
{"items":
 [{"label": "foo",
   "kind": 5,
   "data": ["file:///completion.lean", 3, 22, 1, "cFoo.foo"]}],
 "isIncomplete": false}
Resolution of foo:
{"label": "foo",
 "kind": 5,
 "detail": "Foo → Nat",
 "data": ["file:///completion.lean", 3, 22, 1, "cFoo.foo"]}
{"textDocument": {"uri": "file:///completion.lean"},
 "position": {"line": 5, "character": 23}}
{"items":
 [{"label": "foo",
   "kind": 5,
   "data": ["file:///completion.lean", 5, 23, 1, "cFoo.foo"]}],
 "isIncomplete": false}
Resolution of foo:
{"label": "foo",
 "kind": 5,
 "detail": "Foo → Nat",
 "data": ["file:///completion.lean", 5, 23, 1, "cFoo.foo"]}
{"textDocument": {"uri": "file:///completion.lean"},
 "position": {"line": 7, "character": 28}}
{"items":
 [{"label": "foo",
   "kind": 5,
   "data": ["file:///completion.lean", 7, 28, 0, "cFoo.foo"]}],
 "isIncomplete": false}
Resolution of foo:
{"label": "foo",
 "kind": 5,
 "detail": "Foo → Nat",
 "data": ["file:///completion.lean", 7, 28, 0, "cFoo.foo"]}
{"textDocument": {"uri": "file:///completion.lean"},
 "position": {"line": 9, "character": 29}}
{"items":
 [{"label": "foo",
   "kind": 5,
   "data": ["file:///completion.lean", 9, 29, 0, "cFoo.foo"]}],
 "isIncomplete": false}
Resolution of foo:
{"label": "foo",
 "kind": 5,
 "detail": "Foo → Nat",
 "data": ["file:///completion.lean", 9, 29, 0, "cFoo.foo"]}