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: transaction_throughput.rs
    path of file: ./repos/fuel-core/benches/benches
    
    the code of the file until where you have to start completion: //! Tests throughput of various transaction types

use criterion::{
    criterion_group,
    criterion_main,
    measurement::WallTime,
    BenchmarkGroup,
    Criterion,
    SamplingMode,
};
use fuel_core::service::config::Trigger;
use fuel_core_benches::*;
use fuel_core_types::{
    fuel_asm::{
        op,
        GMArgs,
        GTFArgs,
        RegId,
    },
    fuel_crypto::*,
    fuel_tx::{
        Finalizable,
        Input,
        Output,
        Script,
        Transaction,
        TransactionBuilder,
    },
    fuel_types::{
    
    
fn signed_transfers(c: &mut Criterion) {
    let generator = |rng: &mut StdRng| {
        TransactionBuilder::script(vec![], vec![])
            .script_gas_limit(10000)
            .add_unsigned_coin_input(
                SecretKey::random(rng),
                rng.gen(),
                1000,
                Default::default(),
                Default::default(),
            )
            .add_unsigned_coin_input(
                SecretKey::random(rng),
                rng.gen(),
                1000,
                Default::default(),
                Default::default(),
            )
            .add_output(Output::coin(rng.gen(), 50, AssetId::default()))
            .add_output(Output::change(rng.gen(), 0, AssetId::default()))
            .finalize()
    };
    bench_txs("signed transfers", c, generator);
}