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: put-records-batch.rs
    path of file: ./repos/aws-sdk-rust/examples/examples/firehose/src/bin
    
    the code of the file until where you have to start completion: // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

#![allow(clippy::result_large_err)]

use aws_config::meta::region::RegionProviderChain;
use aws_sdk_firehose::error::SdkError;
use aws_sdk_firehose::operation::put_record_batch::{PutRecordBatchError, PutRecordBatchOutput};
use aws_sdk_firehose::primitives::Blob;
use aws_sdk_firehose::types::Record;
use aws_sdk_firehose::{config::Region, meta::PKG_VERSION, Client, Error};
use clap::Parser;

#[derive(Debug, Parser)]
struct Opt {
    /// The AWS Region.
    #[structopt(short, long)]
    region: Option<String>,

    /// Whether to display additional information.
    #[structopt(short, long)]
    verbose: bool,

    /// Whether to display additional information.
    #[structopt(long)]
    firehose_stream: String,
}

// Displays the STS AssumeRole Arn.
// snippet-start:[firehose.rust.put_record_batch]
async fn put_record_batch(
    clie
    
async fn main() -> Result<(), Error> {
    tracing_subscriber::fmt::init();
    let Opt {
        region,
        verbose,
        firehose_stream,
    } = Opt::parse();

    let region_provider = RegionProviderChain::first_try(region.map(Region::new))
        .or_default_provider()
        .or_else(Region::new("us-west-2"));
    println!();

    if verbose {
        println!("Firehose client version: {}", PKG_VERSION);
        println!(
            "Region:                  {}",
            region_provider.region().await.unwrap().as_ref()
        );
        println!();
    }

    let shared_config = aws_config::from_env().region(region_provider).load().await;
    let client = Client::new(&shared_config);

    // initialize a list of 500 records and add a single record to it
    let mut data = Vec::with_capacity(500);
    let payload = String::from("Some random payload");
    let tmp = Some(Blob::new(payload.to_string()));
    data.push(
        Record::builder()
            .set_data(tmp)
            .build()
            .expect("Failed to create a new record"),
    );

    let resp = put_record_batch(&client, &firehose_stream, data).await;
    match resp {
        Ok(_) => Ok(()),
        Err(e) => Err(Error::from(e)),
    }
}