{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"open_delim.eq_ignoring_invisible_origin(&delim),"}]}
                        open_delim.eq_ignoring_invisible_origin(&delim),
                    assert!(
                        "Mismatched open/close delims: open={open_delim:?} close={span:?}"