void foo(int a, int b);

/*
OUTPUT:
{
  "includes": [],
  "skipped_ranges": [],
  "usr2func": [{
      "usr": 2747674671862363334,
      "detailed_name": "void foo(int a, int b)",
      "qual_name_offset": 5,
      "short_name": "foo",
      "kind": 12,
      "storage": 0,
      "declarations": ["1:6-1:9|1:1-1:23|0|1|1|-1"],
      "bases": [],
      "derived": [],
      "vars": [],
      "uses": [],
      "callees": []
    }],
  "usr2type": [],
  "usr2var": []
}
*/