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: modifications.rs
    path of file: ./repos/cargo-watt/src/wasm
    
    the code of the file until where you have to start completion: use std::path::Path;
use toml_edit::{value, Document};

pub fn make_modifications(path: &Path) -> Result<Vec<ProcMacroFn>, anyhow::Error> {
    let toml_path = path.
    
fn rename_tokenstream(sig: &mut syn::Signature) {
    let token_stream: syn::Type = syn::parse_quote!(proc_macro2::TokenStream);

    for input in &mut sig.inputs {
        if let syn::FnArg::Typed(pat_type) = input {
            pat_type.ty = Box::new(token_stream.clone());
        }
    }

    sig.output = syn::ReturnType::Type(syn::parse_quote!(->), Box::new(token_stream));
}