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: shortest_path.rs
    path of file: ./repos/rustfst/rustfst/src/algorithms
    
    the code of the file until where you have to start completion: use std::cell::RefCell;

use anyhow::Result;
use unsafe_unwrap::UnsafeUnwrap;

use crate::algorithms::determinize::determinize_with_distance;
use crate::algorithms::queues::AutoQueue;
use crate::algorithms::tr_filters::AnyTrFilter;
use crate::algorithms::{
    connect, reverse, shortest_di
    
    fn pweight(&self, state: &Option<StateId>) -> &W {
        if let Some(_state) = state {
            let _state = *_state as usize;
            if _state < self.distance.len() {
                &self.distance[_state]
            } else {
                &self.weight_zero
            }
        } else {
            &self.weight_one
        }
    }