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: replacements.rs
    path of file: ./repos/rustrict/src
    
    the code of the file until where you have to start completion: use crate::feature_cell::FeatureCell;
use crate::Map;
use arrayvec::ArrayString;
use lazy_static::lazy_static;
use std::collections::hash_map::Entry;
use std::ops::Deref;

laz
    
    pub fn remove(&mut self, src: char, dst: char) {
        if let Entry::Occupied(mut occupied) = self.0.entry(src) {
            let mut filtered = ArrayString::default();
            for c in occupied.get().chars() {
                if c != dst {
                    filtered.push(c);
                }
            }
            if filtered.is_empty() {
                occupied.remove();
            } else {
                occupied.insert(filtered);
            }
        }
    }