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: mod.rs
    path of file: ./repos/citybound/cb_simulation/src/economy/market
    
    the code of the file until where you have to start completion: use kay::{ActorSystem, Fate, World, Actor};
use compact::{CVec, CDict};
use super::resources::{Inventory, Entry, Resource, ResourceAmount};
use super::households::OfferID;
use cb_time::units::{TimeOfDayRange, Duration, Instant};
use transport::pathfinding::{RoughLocationID, LocationRequesterID};
use cb_util::log::warn;
const LOG_T: &str = "Market";

#[derive(Compact, Clone, Debug, Serialize, Deserialize)]
pub struct Deal {
    pub duration: Duration,
    pub delta: Inventory,
}

impl Deal {
    pub fn new<T: IntoIterator<Item = (Resource, ResourceAmount)>>(
        delta: T,
        duration: Duration,
    ) -> Self {
        Deal {
            duration,
            delta: delta.into_iter().collect(),
        }
    }

    pub fn main_given(&self) -> Resource {
        self.delta
            .iter()
            .filter_map(|&Entry(resource, amount)| if amount > 0.0 { Some(resource) } else { None })
            .next()
            .unwrap()
    }
}

pub trait EvaluationRequester {
    fn expect_n_results(&mut self, resource: Resource, n: u32, world: &mut World);
    fn on_result(&mut self, result: &EvaluatedSearchResult, world: &mut World);
}

#[derive(Compact, Clone)]
pub struct Market {
    id: MarketID,
    offers_by_resource: CDict<Resource, CVec<OfferID>>,
}

impl Market {
    pub fn spawn(id: MarketID, _: &mut World) 
    
    fn on_distance(&mut self, maybe_distance: Option<f32>, world: &mut World) {
        const ASSUMED_AVG_SPEED: f32 = 10.0; // m/s

        let result = if let Some(distance) = maybe_distance {
            EvaluatedSearchResult {
                evaluated_deals: self
                    .base_result
                    .evaluated_deals
                    .iter()
                    .map(|evaluated_deal| {
                        let estimated_travel_time = Duration((distance / ASSUMED_AVG_SPEED) as u32);
                        let mut new_deal = evaluated_deal.clone();
                        new_deal.deal.duration += estimated_travel_time;
                        new_deal.opening_hours =
                            new_deal.opening_hours.earlier_by(estimated_travel_time);
                        // TODO: adjust resources to incorporate travel costs
                        new_deal
                    })
                    .collect(),
                ..self.base_result
            }
        } else {
            warn(
                LOG_T,
                format!(
                    "No distance for {}, from {:?} to {:?}",
                    self.base_result.resource, self.source, self.destination
                ),
                self.id(),
                world,
            );
            EvaluatedSearchResult {
                resource: self.base_result.resource,
                evaluated_deals: CVec::new(),
            }
        };
        self.requester.on_result(result, world);
        self.id.done(world);
    }