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: shared.rs
    path of file: ./repos/synth/gen/src
    
    the code of the file until where you have to start completion: use crate::{Generator, GeneratorState};

use std::{
    cell::RefCell,
    collections::{BTreeMap, VecDeque},
    rc::Rc,
};

use rand::Rng;

impl<G> Generator for Rc<RefCell<G>>
where
    G: Generator,
{
    type Yield = G::Yield;

    type Return = G::Return;

    fn next<R: Rng>(&mut self, rng: &mut R) -> GeneratorState<Self::Yield, Self::Return> {
        self.borrow_mut().next(rng)
    }
}

pub type DependentId = u16;

pub type GeneratedQueue<G: Generator> = VecDeque<GeneratorState<G::Yield, G::Return>>;

pub struct InnerStar<G: Generator> {
    inner: G,
    routes: BTreeMap<DependentId, GeneratedQueue<G>>,
}

impl<G> InnerStar<G>
where
    G: Generator,
{
    fn new(generator: G) -> Self {
        Self {
            inner: generator,
            routes: BTreeMap::new(),
        }
    }
}

im
    
    fn shared() {
        let mut rng = rand::thread_rng();

        let gen = Random::new::<u16>().once();

        let mut shared_1 = Shared::new(gen);
        let mut shared_2 = shared_1.clone();

        for _ in 0..5 {
            assert_eq!(shared_1.next(&mut rng), shared_2.next(&mut rng));
        }

        let mut left_next_5 = Vec::with_capacity(5);
        for _ in 0..5 {
            left_next_5.push(shared_1.next(&mut rng));
        }

        let mut right_next_5 = Vec::with_capacity(5);
        for _ in 0..5 {
            right_next_5.push(shared_2.next(&mut rng));
        }

        let shared_3: Shared<Once<Random<u16>>> = shared_1.clone();

        let left_next_5_after = shared_3.repeat(5).complete(&mut rng);
        let right_next_5_after = shared_2.repeat(5).complete(&mut rng);

        assert_eq!(left_next_5, right_next_5);

        assert_eq!(left_next_5_after, right_next_5_after);
    }