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: partition.rs
    path of file: ./repos/rustfst/rustfst/src/algorithms
    
    the code of the file until where you have to start completion: use crate::algorithms::Queue;
use crate::StateId;

#[derive(Debug, Clone)]
pub struct Partition {
    elements: Vec<Element>,
    classes: Vec<Class>,
    visited_classes: Vec<usize>,
    yes_counter: usize,
}

impl Partition {
    pub fn empty_new() -> Self {
        Self {
            elements: vec![],
            classes: vec![],
            visited_classes: vec![],
            yes_counter: 0,
        }
    }

    pub fn new(num_elements: usize) -> Self {
        let mut c = Self::empty_new();
        c.initialize(num_elements);
        c
    }

    pub fn initialize(&mut self, num_elements: usize) {
        self.elements.resize_with(num_elements, Element::new);
        self.classes.clear();
        self.classes.reserve(num_elements);
        self.yes_counter = 1;
    }

    pub fn add_class(&mut self) -> usize {
        let num_class = self.classes.len();
        self.classes.resize_with(num_class + 1, Class::new);
        num_class
    }

    pub fn allocate_classes(&mut self, num_additional_classes: usize) {
        let num_class = self.classes.len();
        self.classes
            .resize_with(num_class + num_additional_classes, Class::new);
    }

    pub fn add(&mut self, element_id: usize, class_id: usize) {
        let mut this_class = &mut self.classes[class_id];
        this_class.size += 1;

        let no_head = this_class.no_head;
        if no_head >= 0 {
            self.elements[no_head as usize].prev_element = element_id as i32;
        }
        this_class.no_head = element_id as i32;

        let mut this_element = &mut self.elements[element_id];
        this_element.class_id = class_id;
        this_element.yes = 0;
        this_element.next_element = no_head;
        this_element.prev_element = -1;
    }

    pub fn move_element(&mut self, element_id: usize, class_id: usize) {
        let elt_prev_elt = self.elements[element_id].prev_element;
        let
    
    pub fn split_refine(&mut self, class_id: usize) -> i32 {
        let yes_size = self.classes[class_id].yes_size;
        let size = self.classes[class_id].size;
        let no_size = size - yes_size;
        if no_size == 0 {
            // All members are in the 'yes' subset, so we don't have to create a new
            // class, just move them all to the 'no' subset.
            self.classes[class_id].no_head = self.classes[class_id].yes_head;
            self.classes[class_id].yes_head = -1;
            self.classes[class_id].yes_size = 0;
            -1
        } else {
            let new_class_id = self.classes.len();
            self.classes.resize_with(self.classes.len() + 1, Class::new);
            // The new_class will have the values from the constructor.
            if no_size < yes_size {
                // Moves the 'no' subset to new class ('no' subset).
                self.classes[new_class_id].no_head = self.classes[class_id].no_head;
                self.classes[new_class_id].size = no_size;
                // And makes the 'yes' subset of the old class ('no' subset).
                self.classes[class_id].no_head = self.classes[class_id].yes_head;
                self.classes[class_id].yes_head = -1;
                self.classes[class_id].size = yes_size;
                self.classes[class_id].yes_size = 0;
            } else {
                // Moves the 'yes' subset to the new class (to the 'no' subset)
                self.classes[new_class_id].size = yes_size;
                self.classes[new_class_id].no_head = self.classes[class_id].yes_head;
                // Retains only the 'no' subset in the old class.
                self.classes[class_id].size = no_size;
                self.classes[class_id].yes_size = 0;
                self.classes[class_id].yes_head = -1;
            }

            // Updates the 'class_id' of all the elements we moved.
            let mut e = self.classes[new_class_id].no_head;
            loop {
                if e < 0 {
                    break;
                }
                self.elements[e as usize].class_id = new_class_id;
                e = self.elements[e as usize].next_element;
            }
            new_class_id as i32
        }
    }