class Root {
  virtual void foo();
};
class Derived : public Root {
  void foo() override {}
};

/*
OUTPUT:
{
  "types": [{
      "id": 0,
      "usr": "c:@S@Root",
      "short_name": "Root",
      "qualified_name": "Root",
      "definition_spelling": "1:7-1:11",
      "definition_extent": "1:1-3:2",
      "derived": [1],
      "funcs": [0],
      "uses": ["*1:7-1:11", "*4:24-4:28"]
    }, {
      "id": 1,
      "usr": "c:@S@Derived",
      "short_name": "Derived",
      "qualified_name": "Derived",
      "definition_spelling": "4:7-4:14",
      "definition_extent": "4:1-6:2",
      "parents": [0],
      "funcs": [1],
      "uses": ["*4:7-4:14"]
    }],
  "funcs": [{
      "id": 0,
      "usr": "c:@S@Root@F@foo#",
      "short_name": "foo",
      "qualified_name": "Root::foo",
      "declarations": ["2:16-2:19"],
      "declaring_type": 0,
      "derived": [1],
      "uses": ["2:16-2:19"]
    }, {
      "id": 1,
      "usr": "c:@S@Derived@F@foo#",
      "short_name": "foo",
      "qualified_name": "Derived::foo",
      "definition_spelling": "5:8-5:11",
      "definition_extent": "5:3-5:25",
      "declaring_type": 1,
      "base": 0,
      "uses": ["5:8-5:11"]
    }]
}
*/