{"ast_node_type":"variable","tokens":[{"end":101,"kind":"keyword","start":0,"text":"let"}]}
                    let dot_span = span.with_lo(left_span.hi()).with_hi(left_span.hi() + BytePos(1));
                    let left_span = span.with_hi(span.lo() + BytePos::from_usize(left.len()));
                    let right_span = span.with_lo(dot_span.hi());