{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.untracked.source_span.get(def_id).unwrap_or(DUMMY_SP)"}]}
        self.untracked.source_span.get(def_id).unwrap_or(DUMMY_SP)
    fn def_span(&self, def_id: LocalDefId) -> Span {
    }