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: prune.rs
    path of file: ./repos/rustic/src/commands
    
    the code of the file until where you have to start completion: //! `prune` subcommand

use crate::{
    commands::open_repository, helpers::bytes_size_to_string, status_err, Application, RUSTIC_APP,
};
use abscissa_core::{Command, Runnable, Shutdown};
use log::debug;

use anyhow::Result;

use rustic_core::{PruneOptions, PruneStats};

/// `prune` subcommand
#[allow(clippy::struct_excessive_bools)]
#[derive(clap::Parser, Command, Debug, Clone)]
pub(crate) struct PruneCmd {
    /// Prune options
    #[clap(flatten)]
    pub(crate) opts: PruneOptions,
}

impl Runnable for PruneCmd {
    fn run(&self) {
        if let Err(err) = self.inner_run() {
            status_err!("{}", err);
            RUSTIC_APP.shutdown(Shutdown::Crash);
        };
    }
}

impl PruneCmd {
    fn inner_run(&self) -> Result<()> {
        let config = RUSTIC_APP.config();
        let repo = open_repository(&config.repository)?;

        let pruner = repo.prune_plan(&self.opts)?;

        print_stats(&pruner.stats);

        if config.global.dry_run {
            repo.warm_up(pruner.repack_packs().into_iter())?;
        } else {
            pruner.do_prune(&repo, &self.opts)?;
        }

        Ok(())
    }
}

/// Print statistics about the prune operation
///
/// # Arguments
///
/// * `stats` - Statistics about the prune operation
#[allow(clippy::cast_precision_loss)]
fn print_stats(stats: &PruneStats) {
    let pack_stat = &stats.packs;
    let blob_stat = stats.blobs_sum();
    let size_stat = stats.size_sum();

    debug!("statistics:");
    debug!("{:#?}", stats.debug);

    debug!(
        "used:   {:>10} blobs, {:>10}",
   
    
fn print_stats(stats: &PruneStats) {
    let pack_stat = &stats.packs;
    let blob_stat = stats.blobs_sum();
    let size_stat = stats.size_sum();

    debug!("statistics:");
    debug!("{:#?}", stats.debug);

    debug!(
        "used:   {:>10} blobs, {:>10}",
        blob_stat.used,
        bytes_size_to_string(size_stat.used)
    );

    debug!(
        "unused: {:>10} blobs, {:>10}",
        blob_stat.unused,
        bytes_size_to_string(size_stat.unused)
    );
    debug!(
        "total:  {:>10} blobs, {:>10}",
        blob_stat.total(),
        bytes_size_to_string(size_stat.total())
    );

    println!(
        "to repack: {:>10} packs, {:>10} blobs, {:>10}",
        pack_stat.repack,
        blob_stat.repack,
        bytes_size_to_string(size_stat.repack)
    );
    println!(
        "this removes:                {:>10} blobs, {:>10}",
        blob_stat.repackrm,
        bytes_size_to_string(size_stat.repackrm)
    );
    println!(
        "to delete: {:>10} packs, {:>10} blobs, {:>10}",
        pack_stat.unused,
        blob_stat.remove,
        bytes_size_to_string(size_stat.remove)
    );
    if !stats.packs_unref > 0 {
        println!(
            "unindexed: {:>10} packs,         ?? blobs, {:>10}",
            stats.packs_unref,
            bytes_size_to_string(stats.size_unref)
        );
    }

    println!(
        "total prune:                 {:>10} blobs, {:>10}",
        blob_stat.repackrm + blob_stat.remove,
        bytes_size_to_string(size_stat.repackrm + size_stat.remove + stats.size_unref)
    );
    println!(
        "remaining:                   {:>10} blobs, {:>10}",
        blob_stat.total_after_prune(),
        bytes_size_to_string(size_stat.total_after_prune())
    );
    println!(
        "unused size after prune: {:>10} ({:.2}% of remaining size)",
        bytes_size_to_string(size_stat.unused_after_prune()),
        size_stat.unused_after_prune() as f64 / size_stat.total_after_prune() as f64 * 100.0
    );

    println!();

    println!(
        "packs marked for deletion: {:>10}, {:>10}",
        stats.packs_to_delete.total(),
        bytes_size_to_string(stats.size_to_delete.total()),
    );
    println!(
        " - complete deletion:      {:>10}, {:>10}",
        stats.packs_to_delete.remove,
        bytes_size_to_string(stats.size_to_delete.remove),
    );
    println!(
        " - keep marked:            {:>10}, {:>10}",
        stats.packs_to_delete.keep,
        bytes_size_to_string(stats.size_to_delete.keep),
    );
    println!(
        " - recover:                {:>10}, {:>10}",
        stats.packs_to_delete.recover,
        bytes_size_to_string(stats.size_to_delete.recover),
    );

    debug!(
        "index files to rebuild: {} / {}",
        stats.index_files_rebuild, stats.index_files
    );
}