{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
                    let span: InFile<SyntaxNodePtr> = match moof.span {
                for moof in &borrowck_result.moved_out_of_ref {
                        mir::MirSpan::ExprId(e) => match source_map.expr_syntax(e) {