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: row.rs
    path of file: ./repos/prettytable-rs/src
    
    the code of the file until where you have to start completion: //! This module contains definition of table rows stuff
use std::io::{Error, Write};
use std::iter::FromIterator;
use std::slice::{Iter, IterMut};
// use std::vec::IntoIter;
use std::ops::{Index, IndexMut};

use super::Termin
    
    pub fn print_html<T: Write + ?Sized>(&self, out: &mut T, col_num: usize) -> Result<(), Error> {
        let mut printed_columns = 0;
        for cell in self.iter() {
            printed_columns += cell.print_html(out)?;
        }
        // Pad with empty cells, if target width is not reached
        for _ in 0..col_num - printed_columns {
            Cell::default().print_html(out)?;
        }
        Ok(())
    }