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: comment.rs
    path of file: ./repos/doku/doku/src/printers/json/print_enum/commented
    
    the code of the file until where you have to start completion: use super::*;

pub(super) fn comment(
    ctxt: &mut Ctxt<'_, '_, '_>,
    tag: Tag,
    variants: &[&Variant],
) {
    ctxt.out.append_comment(|comment| {
        if comment.is_empty() {
            swrite!(comment, "Possible variants:");
        } else {
            swrite!(comment, "; possible variants:");
        }
    });

    for variant in variants {
        comment_variant(ctxt, tag, variant);
    }
}

fn comment_variant(ctxt: &mut Ctxt<'_, '_, '_>, tag: Tag, variant: &Variant) {
    let rendered_variant = render_variant(ctxt, tag, variant);

    let rendered_variant = rendered_variant
        .lines()
        .enumerate()
        .map(|(line_idx, line)| {
  
    
fn comment_variant(ctxt: &mut Ctxt<'_, '_, '_>, tag: Tag, variant: &Variant) {
    let rendered_variant = render_variant(ctxt, tag, variant);

    let rendered_variant = rendered_variant
        .lines()
        .enumerate()
        .map(|(line_idx, line)| {
            if line_idx > 0 {
                format!("  {}", line)
            } else {
                line.to_owned()
            }
        })
        .collect::<Vec<_>>()
        .join("\n");

    let mut str = format!("- {}", rendered_variant);

    // ---

    let comment = if let Some(comment) = variant.comment {
        Some(comment)
    } else if variant.title != variant.id {
        Some(variant.title)
    } else {
        None
    };

    if let Some(comment) = comment {
        if str.lines().count() == 1 && comment.lines().count() == 1 {
            swrite!(str, " = {}", comment);
        } else {
            for (comment_line_idx, comment_line) in
                comment.split('\n').enumerate()
            {
                if comment_line_idx == 0 {
                    swrite!(str, "\n  = {}", comment_line);
                } else {
                    swrite!(str, "\n    {}", comment_line);
                }
            }
        }
    }

    // ---

    ctxt.out.writeln_comment(str);
}