You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: print_counterexample.rs
    path of file: ./repos/prusti-dev/prusti-contracts/prusti-specs/src
    
    the code of the file until where you have to start completion: use super::rewriter::AstRewriter;
use itertools::Itertools;
use proc_macro2::{Span, TokenStream};
use quote::{quote_spanned, ToTokens};
use syn::{
    parse::Parser, parse_quote_spanned, punctuated::Punctuated, spanned::Spanned, Expr, ExprLit,
    Fields, Generics, Ident, Lit, Pat, PatLit, Token,
};

pub fn rewrite_struct(
    attrs: TokenStream,
    item_struct: syn::ItemStruct,
) -> syn::Result<Vec<syn::Item>> {
    let res = rewrite_internal_struct(attrs, item_struct);
    match res {
        Ok(result) => Ok(result),
        Err(err) => Er
    
    fn from(err: TypeCounterexampleError) -> Self {
        match err {
            TypeCounterexampleError::ArgumentsDoNotMatch(span) => {
                syn::Error::new(span, "Number of arguments and number of {} do not match")
            }
            TypeCounterexampleError::WrongFirstArgument(span) => {
                syn::Error::new(span, "First argument must be a string literal")
            }
            TypeCounterexampleError::AtLeastOneArgument(span) => {
                syn::Error::new(span, "At least one argument is expected")
            }
            TypeCounterexampleError::InvalidName(span) => {
                syn::Error::new(span, "Invalid argument name")
            }
            TypeCounterexampleError::InvalidArgument(span, name, arg) => {
                syn::Error::new(span, format!("`{name}` does not have a field named {arg}"))
            }
            TypeCounterexampleError::WrongNumberOfArguemnts(span) => {
                syn::Error::new(span, "Number of arguments are incorrect")
            }
            TypeCounterexampleError::ParsingError(parse_err) => parse_err,
        }
    }