{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
        // Make a multipart suggestion instead of `span_to_snippet` in case source isn't available
        let (span, expr) = self.parse_expr_prefix_common(box_kw)?;
        let box_kw_and_lo = box_kw.until(self.interpolated_or_expr_span(&expr));