{
  "title": "Shape Class Hierarchy with Area",
  "origin_url": "https://en.wikipedia.org/wiki/Common_Lisp_Object_System",
  "license_guess": null,
  "code_sha256": "b2bfa10ce087f5c96b6c4f29230d6af41bb1a03d9c14e948195e45d2e098c930",
  "added_at": "2026-02-25T08:19:11Z"
}