{"ast_node_type":"variable","tokens":[{"end":54,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(else_block) = else_block {
                record_rvalue_scope_if_borrow_expr(visitor, then_block, blk_id);
                    record_rvalue_scope_if_borrow_expr(visitor, else_block, blk_id);