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: minimum_redundancy.rs
    path of file: ./repos/bsuccinct-rs/coding_benchmark/src
    
    the code of the file until where you have to start completion: use std::collections::HashMap;
use std::hint::black_box;

use bitm::{BitAccess, BitVec};
use butils::UnitPrefix;
use dyn_size_of::GetSize;
use minimum_redundancy::{BitsPerFragment, Code, Coding};
use minimum_redundancy::Frequencies;

use crate::compare_texts;

/// Prints speed of and returns counting symbol occurrences.
pub fn frequencies_u8(conf:
    
pub fn frequencies_u8(conf: &super::Conf, text: &[u8]) -> [usize; 256] {
    if conf.extra_test {
        conf.print_speed(" Counting symbol occurrences with array (u8 specific method)", conf.measure(||
            <[usize; 256]>::with_occurrences_of(text.iter())
        ));
    }
    let result = <[usize; 256]>::with_occurrences_of(text.iter());
    println!(" Input of length {} consists of {} different symbols, its entropy is {:.2} bits/symbol.",
        text.len(), result.number_of_occurring_values(), result.entropy());
    result
}