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: noop.rs
    path of file: ./repos/napi-rs/crates/macro/src/expand
    
    the code of the file until where you have to start completion: use napi_derive_backend::BindgenResult;
use proc_macro2::TokenStream;
use quote::ToTokens;
use syn::Attribute;

pub fn expand(_attr: TokenStream, input: TokenStream) -> BindgenResult<TokenS
    
fn find_and_remove_napi_attr(attrs: &mut Vec<Attribute>) {
  loop {
    let napi_attr = attrs
      .iter()
      .enumerate()
      .find(|&(_, m)| m.path().segments[0].ident == "napi");

    let pos = match napi_attr {
      Some((pos, _raw_attr)) => pos,
      None => break,
    };

    attrs.remove(pos);
  }
}