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: log_stream.rs
    path of file: ./repos/kube/examples
    
    the code of the file until where you have to start completion: use futures::{AsyncBufReadExt, TryStreamExt};
use k8s_openapi::{
    api::core::v1::Pod,
    chrono::{DateTime, Utc},
};
use kube::{
    api::{Api, LogParams},
    Client,
};
use tracing::*;

/// limited variant of kubectl logs
#[derive(clap::Parser)]
struct App {
    #[arg(long, short = 'c')]
    container: Option<String>,

    #[arg(long, short = 't')]
    tail: Option<i64>,

    #[arg(long, short = 'f')]
    follow: bool,

    /// Since seconds
    #[arg(long, conflicts_with = "since_time")]
    since: Option<i64>,
    /// Since time
    #[arg(long, conflicts_with = "since")]
    since_time: Option<DateTime<Utc>
    
async fn main() -> anyhow::Result<()> {
    tracing_subscriber::fmt::init();
    let app: App = clap::Parser::parse();
    let client = Client::try_default().await?;

    info!("Fetching logs for {:?}", app.pod);
    let pods: Api<Pod> = Api::default_namespaced(client);
    let mut logs = pods
        .log_stream(&app.pod, &LogParams {
            follow: app.follow,
            container: app.container,
            tail_lines: app.tail,
            since_seconds: app.since,
            since_time: app.since_time,
            timestamps: app.timestamps,
            ..LogParams::default()
        })
        .await?
        .lines();

    while let Some(line) = logs.try_next().await? {
        println!("{}", line);
    }
    Ok(())
}