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: media_query.rs
    path of file: ./repos/lewp-rs/lewp-css/src/domain/at_rules/media
    
    the code of the file until where you have to start completion: // This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright Â© 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.

use {
    super::{MediaQueryType, Qualifier},
    crate::{
        domain::at_rules::media::MediaExpression,
        parsers::{
            separators::{Comma, Separated},
            ParserContext,
        },
        CustomParseError,
    },
    cssparser::{ParseError, Parser, ToCss},
    either::{Left, Right},
    std::fmt::{self},
};

    
    fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result {
        if let Some(qualifier) = self.qualifier {
            qualifier.to_css(dest)?;
            dest.write_char(' ')?;
        }

        use self::MediaQueryType::*;

        match self.media_type {
            All => {
                // We need to print "all" if there's a qualifier, or there's just an empty list of expressions.
                // Otherwise, we'd serialize media queries like "(min-width: 40px)" in "all (min-width: 40px)", which is unexpected.
                if self.qualifier.is_some() || self.expressions.is_empty() {
                    dest.write_str("all")?;
                }
            }

            Concrete(ref value) => value.to_css(dest)?,
        }

        if self.expressions.is_empty() {
            return Ok(());
        }

        if self.media_type != All || self.qualifier.is_some() {
            dest.write_str(" and ")?;
        }

        self.expressions[0].to_css(dest)?;
        for expression in self.expressions.iter().skip(1) {
            dest.write_str(" and ")?;
            expression.to_css(dest)?;
        }

        Ok(())
    }