{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"Some(self.alloc_expr_desugared(Expr::Literal(Literal::String(s.clone()))))"}]}
                        Some(self.alloc_expr_desugared(Expr::Literal(Literal::String(s.clone()))))
                    FormatArgsPiece::Literal(s) => {
                    }