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: succinct.rs
    path of file: ./repos/bsuccinct-rs/cseq_benchmark/src
    
    the code of the file until where you have to start completion: use succinct::{rank, select::{Select0Support, Select1Support}, BinSearchSelect, BitRankSupport, BitVecMut, BitVector, SpaceUsage};
use crate::{Conf, Tester};

pub fn build_bit_vec(conf: &Conf) -> 
    
fn benchmark(mut tester: super::Tester, method_name: &str, rank: impl BitRankSupport+SpaceUsage) {
    tester.rank_includes_current = true;
    tester.raport_rank(method_name, rank.total_bytes(),
        |index| rank.rank1(index as u64) as usize);
    println!(" select by binary search over ranks (no extra space overhead):");
    let select = BinSearchSelect::new(rank);
    tester.raport_select1(method_name, 0, |index| select.select1(index as u64).map(|v| v as usize));
    tester.raport_select0(method_name, 0, |index| select.select0(index as u64).map(|v| v as usize));
}