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: lib.rs
    path of file: ./repos/bevy/crates/bevy_asset/macros/src
    
    the code of the file until where you have to start completion: // FIXME(3492): remove once docs are ready
#![allow(missing_docs)]

use bevy_macro_utils::BevyManifest;
use proc_macro::{Span, TokenStream};
use quote::{format_ident, quote};
use syn::{parse_macro_input, Data, DeriveInput, Path};

pub(crate) fn bevy_asset_path() -> Path {
    BevyManifest::default().get_path("bevy_asset")
}

const DEPENDENCY_ATTRIBUTE: &str = "dependency";

#[proc_macro_derive(Asset, attributes(dependency))]
pub fn derive_asset(input: TokenStream) -> TokenStream {
    let as
    
pub fn derive_asset(input: TokenStream) -> TokenStream {
    let ast = parse_macro_input!(input as DeriveInput);
    let bevy_asset_path: Path = bevy_asset_path();

    let struct_name = &ast.ident;
    let (impl_generics, type_generics, where_clause) = &ast.generics.split_for_impl();
    let dependency_visitor = match derive_dependency_visitor_internal(&ast, &bevy_asset_path) {
        Ok(dependency_visitor) => dependency_visitor,
        Err(err) => return err.into_compile_error().into(),
    };

    TokenStream::from(quote! {
        impl #impl_generics #bevy_asset_path::Asset for #struct_name #type_generics #where_clause { }
        #dependency_visitor
    })
}