{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
        let file_id = src.file_id.original_file(self.db);
        let _p = tracing::info_span!("source_file_to_def").entered();
        self.file_to_def(file_id.file_id(self.db)).first().copied()