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: virtual_connection.rs
    path of file: ./repos/laminar/src/net
    
    the code of the file until where you have to start completion: use std::fmt;
use std::net::SocketAddr;
use std::time::{Duration, Instant};

use crate::{
    config::Config,
    error::{ErrorKind, PacketErrorKind, Result},
    infrastructure::{
        arranging::{Arranging, ArrangingSystem, OrderingSystem, SequencingSystem},
        AcknowledgmentHandler, Fragmentation, SentPacket,
    },
    net::constants::{
        ACKED_PACKET_HEADER, DEFAULT_ORDERING_STREAM, DEFAULT_SEQUENCING_STREAM,
        STANDARD_HEADER_SIZE,
    },
    packet::{
        DeliveryGuarantee, IncomingPackets, OrderingGuarantee, OutgoingPacketBuilder,
        OutgoingPackets, Packet, PacketInfo, PacketReader, PacketType, SequenceNumber,
    },
};

/// Contains the information abou
    
    fn assure_right_fragmentation() {
        let mut protocol_version = Vec::new();
        protocol_version
            .write_u16::<BigEndian>(PROTOCOL_VERSION)
            .unwrap();

        let standard_header = [protocol_version, vec![1, 1, 2]].concat();

        let acked_header = vec![0, 0, 0, 4, 0, 0, 255, 255, 0, 0, 0, 0];
        let first_fragment = vec![0, 0, 1, 4];
        let second_fragment = vec![0, 0, 2, 4];
        let third_fragment = vec![0, 0, 3, 4];

        let mut connection = create_virtual_connection();
        let packet = connection
            .process_incoming(
                [standard_header.as_slice(), acked_header.as_slice()]
                    .concat()
                    .as_slice(),
                Instant::now(),
            )
            .unwrap()
            .into_iter()
            .next();
        assert!(packet.is_none());
        let packet = connection
            .process_incoming(
                [
                    standard_header.as_slice(),
                    first_fragment.as_slice(),
                    &PAYLOAD,
                ]
                .concat()
                .as_slice(),
                Instant::now(),
            )
            .unwrap()
            .into_iter()
            .next();
        assert!(packet.is_none());
        let packet = connection
            .process_incoming(
                [
                    standard_header.as_slice(),
                    second_fragment.as_slice(),
                    &PAYLOAD,
                ]
                .concat()
                .as_slice(),
                Instant::now(),
            )
            .unwrap()
            .into_iter()
            .next();
        assert!(packet.is_none());
        let (packets, _) = connection
            .process_incoming(
                [
                    standard_header.as_slice(),
                    third_fragment.as_slice(),
                    &PAYLOAD,
                ]
                .concat()
                .as_slice(),
                Instant::now(),
            )
            .unwrap()
            .into_iter()
            .next()
            .unwrap();
        assert_eq!(
            packets.payload(),
            &*[PAYLOAD, PAYLOAD, PAYLOAD].concat().into_boxed_slice()
        );
    }