{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
                    let right_span = span.with_lo(dot_span.hi());
                    let dot_span = span.with_lo(left_span.hi()).with_hi(left_span.hi() + BytePos(1));
                    (left_span, dot_span, right_span)