{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"///"}]}
    /// `span_note`, `span_help`, etc. Therefore, if the primary span is not displayable (because
    /// be shown together with the original diagnostic's span, *not* with spans added by
    /// the span is `DUMMY_SP` or the source code isn't found), labels will not be displayed