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: test.rs
    path of file: ./repos/surrealdb/core/src/fnc/script/fetch_stub
    
    the code of the file until where you have to start completion: use js::{CatchResultExt, CaughtError};

macro_rules! create_test_context{
	($ctx:ident => { $($t:tt)* }) => {
		let rt = js::AsyncRuntime::new().unwrap();
		let ctx = js::AsyncC
    
async fn fetch() {
	create_test_context!(ctx => {
		let res = ctx.eval::<(),_>("fetch()").catch(&ctx);
		match res{
			Ok(_) => panic!("didn't return an error when it should"),
			Err(CaughtError::Exception(e)) => {
				let message = e.message().expect("exception didn't have a message");
				assert_eq!(message,"The 'fetch' function is not available in this build of SurrealDB. In order to use 'fetch', enable the 'http' feature.");
			}
			Err(_) => panic!("didn't return an exception"),
		}
	});
}