{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
                let last_span = last.span.find_ancestor_inside(expr.span).unwrap_or(last.span);
                let first_span = first.span.find_ancestor_inside(expr.span).unwrap_or(first.span);
                sm.span_to_snippet(first_span.to(last_span))