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: request.rs
    path of file: ./repos/iroh/iroh-bytes/src/get
    
    the code of the file until where you have to start completion: //! Utilities for complex get requests.
use std::sync::Arc;

use crate::{
    hashseq::HashSeq,
    protocol::{GetRequest, RangeSpecSeq},
    Hash, HashAndFormat,
};
use bao_tree::{ByteNum, ChunkNum, ChunkRanges};
use bytes::Bytes;
use rand::Rng;

use super::{fsm, Stats};

/// Get the claimed size of a blob from a peer.
///
/// This is just reading the size header and then immediately closing the connection.
/// It can be used to check if a peer has any data at all.
pub async fn get_unverified_size(
    connection: &quinn::Connection,
    hash: &Hash,
) -> anyhow::Result<(u64, Stats)> {
    let request = GetRequ
    
pub fn random_hash_seq_ranges(sizes: &[u64], mut rng: impl Rng) -> RangeSpecSeq {
    let total_chunks = sizes
        .iter()
        .map(|size| ByteNum(*size).full_chunks().0)
        .sum::<u64>();
    let random_chunk = rng.gen_range(0..total_chunks);
    let mut remaining = random_chunk;
    let mut ranges = vec![];
    ranges.push(ChunkRanges::empty());
    for size in sizes.iter() {
        let chunks = ByteNum(*size).full_chunks().0;
        if remaining < chunks {
            ranges.push(ChunkRanges::from(
                ChunkNum(remaining)..ChunkNum(remaining + 1),
            ));
            break;
        } else {
            remaining -= chunks;
            ranges.push(ChunkRanges::empty());
        }
    }
    RangeSpecSeq::from_ranges(ranges)
}