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: test.rs
    path of file: ./repos/differential-datalog/rust/template/ovsdb
    
    the code of the file until where you have to start completion: use super::*;

use std::fs::{self, DirEntry};
use std::io::BufRead;
use std::path::Path;
use std::{env, io};

/* test_data was copied from
    
fn parse_json_file(entry: &DirEntry) {
    let path = entry.path().to_str().unwrap().to_owned();
    //println!("parsing file {}", path);
    let f = io::BufReader::new(fs::File::open(path).unwrap());
    for line in f.lines() {
        cmds_from_table_updates_str("", line.unwrap().as_ref()).unwrap();
    }
}