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: enum_roundtrip.rs
    path of file: ./repos/differential-datalog/rust/template/ddlog_derive/tests/ui/pass
    
    the code of the file until where you have to start completion: use ddlog_derive::{FromRecord, IntoRecord};
use differential_datalog::record::{FromRecord, IntoRecord};
use serde::Deserialize;
use std::borrow::Cow;

fn main() {
    default_record_names();
    renamed_struct();
}

#[derive(FromRecord, IntoRecord, Debug, Clone, PartialEq, Deserialize)]
enum DefaultRecordNames {
    Foo,
    Bar(u32, u64),
    Baz { bing: u32, bong: String },
}

fn def
    
fn default_record_names() {
    let default = DefaultRecordNames::Foo;
    let default_record = default.clone().into_record();
    assert_eq!(
        DefaultRecordNames::from_record(&default_record),
        Ok(default),
    );
    assert!(default_record.is_struct());
    assert_eq!(
        default_record.struct_constructor(),
        Some(&Cow::Borrowed("DefaultRecordNames::Foo")),
    );
    assert_eq!(default_record.named_struct_fields(), Some(&[][..]));

    let default = DefaultRecordNames::Bar(10, 20);
    let default_record = default.clone().into_record();
    assert_eq!(
        DefaultRecordNames::from_record(&default_record),
        Ok(default),
    );
    assert!(default_record.is_struct());
    assert_eq!(
        default_record.struct_constructor(),
        Some(&Cow::Borrowed("DefaultRecordNames::Bar")),
    );
    assert_eq!(
        default_record.positional_struct_fields(),
        Some(&[10u32.into_record(), 20u64.into_record()][..]),
    );

    let default = DefaultRecordNames::Baz {
        bing: 30,
        bong: "this is a random string".to_owned(),
    };
    let default_record = default.clone().into_record();
    assert_eq!(
        DefaultRecordNames::from_record(&default_record),
        Ok(default),
    );
    assert!(default_record.is_struct());
    assert_eq!(
        default_record.struct_constructor(),
        Some(&Cow::Borrowed("DefaultRecordNames::Baz")),
    );
    assert_eq!(
        default_record.named_struct_fields(),
        Some(
            &[
                (Cow::Borrowed("bing"), 30u32.into_record()),
                (
                    Cow::Borrowed("bong"),
                    "this is a random string".into_record(),
                ),
            ][..]
        ),
    );
}