{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"self.alloc_expr_desugared(Expr::RecordLit"}]}
            self.alloc_expr_desugared(Expr::RecordLit {
                RecordLitField { name: Name::new_symbol_root(sym::width), expr: width_expr };
                path: LangItem::FormatPlaceholder.path(self.db, self.module.krate()).map(Box::new),