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: slice.rs
    path of file: ./repos/xsv/src/cmd
    
    the code of the file until where you have to start completion: use std::fs;


use CliResult;
use config::{Config, Delimiter};
use index::Indexed;
use util;

static USAGE: &'static str = "
Returns the r
    
    fn no_index(&self) -> CliResult<()> {
        let mut rdr = self.rconfig().reader()?;
        let mut wtr = self.wconfig().writer()?;
        self.rconfig().write_headers(&mut rdr, &mut wtr)?;

        let (start, end) = self.range()?;
        for r in rdr.byte_records().skip(start).take(end - start) {
            wtr.write_byte_record(&r?)?;
        }
        Ok(wtr.flush()?)
    }