test_usage_data/rustc_arena_constants.json

{
  "crate": "rustc_arena",
  "module": "constants",
  "usages": [
    {
      "symbol": "PAGE",
      "kind": "const_decl",
      "usage_count": 1,
      "usage_type": "ConstDecl",
      "node_type": "Item",
      "user_def_id": "rustc_arena",
      "used_def_id": "PAGE",
      "user_crate": "rustc_arena",
      "used_crate": null
    },
    {
      "symbol": "HUGE_PAGE",
      "kind": "const_decl",
      "usage_count": 1,
      "usage_type": "ConstDecl",
      "node_type": "Item",
      "user_def_id": "rustc_arena",
      "used_def_id": "HUGE_PAGE",
      "user_crate": "rustc_arena",
      "used_crate": null
    },
    {
      "symbol": "DROPLESS_ALIGNMENT",
      "kind": "const_decl",
      "usage_count": 1,
      "usage_type": "ConstDecl",
      "node_type": "Item",
      "user_def_id": "rustc_arena",
      "used_def_id": "DROPLESS_ALIGNMENT",
      "user_crate": "rustc_arena",
      "used_crate": null
    }
  ]
}