{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"assert_eq!(size_of::<Option<Option<Option<Option<MyIdx>>>>>(),"}]}
    assert_eq!(size_of::<Option<Option<Option<Option<MyIdx>>>>>(), 4);
    // Uses 0xFFFF_FFFE
    // Uses 0xFFFF_FFFF