{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"//"}]}
    // SAFETY: We cannot really encapsulate this unfortunately, so just hope this is sound.
    assert_eq!(idx.ui, chalk_ir::UniverseIndex::ROOT);
    let interned_id = FromId::from_id(unsafe { Id::from_u32(idx.idx.try_into().unwrap()) });