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: lib.rs
    path of file: ./repos/bincode/compatibility/src
    
    the code of the file until where you have to start completion: #![cfg(test)]

use ::rand::Rng;
use bincode_1::Options;

mod membership;
mod misc;
mod rand;
mod sway;

pub fn test_same_with_config<T, C, O>(t: &T, bincode_1_options:
    
pub fn gen_string(rng: &mut impl Rng) -> String {
    let len = rng.gen_range(0..100usize);
    let mut result = String::with_capacity(len * 4);
    for _ in 0..len {
        result.push(rng.gen_range('\0'..char::MAX));
    }
    result
}