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: charset.rs
    path of file: ./repos/biome/crates/biome_css_parser/src/syntax/at_rule
    
    the code of the file until where you have to start completion: use crate::parser::CssParser;
use crate::syntax::parse_error::expected_string;
use crate::syntax::parse_string;
use biome_css_syntax::CssSyntaxKind::*;
use biome_css_syntax::{CssSyntaxKind, TextRange, T};
use biome_parser::parse_recovery::ParseRecoveryTokenSet;
use biome_parser::parsed_syntax::ParsedSyntax::Present;
use biome_parser::prelude::ParsedSyntax::Absent;
use biome_parser::prelude::*;
use biome_rowan::SyntaxKind;

#[inline]
pub(crate) fn is_at_charset_at_rule(p: &mut CssParser) -> bool {
    p.at(T![charset])
}

#[inline]
pub(crate) fn parse_charse
    
pub(crate) fn parse_charset_at_rule(p: &mut CssParser) -> ParsedSyntax {
    if !is_at_charset_at_rule(p) {
        return Absent;
    }

    let m = p.start();

    p.bump(T![charset]);

    let kind = match parse_string(p).or_recover_with_token_set(
        p,
        &ParseRecoveryTokenSet::new(CSS_BOGUS, CHARTSET_RECOVERY_SET)
            .enable_recovery_on_line_break(),
        expected_string,
    ) {
        Ok(encoding) if !encoding.kind(p).is_bogus() => {
            if eat_or_recover_close_token(p, encoding) {
                CSS_CHARSET_AT_RULE
            } else {
                CSS_BOGUS_AT_RULE
            }
        }
        _ => {
            p.expect(T![;]);
            CSS_BOGUS_AT_RULE
        }
    };

    Present(m.complete(p, kind))
}