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: autofix.rs
    path of file: ./repos/zepter/src
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: Oliver Tale-Yazdi <oliver@tasty.limo>

//! Automatically fix problems by modifying `Cargo.toml` files.

use crate::{cmd::fmt::Mode, log};
use cargo_metadata::{Dependency, DependencyKind};
use std::{
	collections::BTreeMap as Map,
	path::{Path, PathBuf},
};
use toml_edit::{table, value, Array, Document, Formatted, InlineTable, Item, Table, Value};

#[derive(Debug, clap::Parser)]
#[cfg_attr(feature = "testing", derive(Default))]
pub struct AutoFixerArgs {
	/// Try to automatically fix the problems.
	#[clap(long = "fix")]
	pub enable: bool,
}

pub struct AutoFixer {
	pub manifest: Option<PathBuf>,
	doc: Option<Document>,
	
    
	pub fn dedub_feature(cname: &str, fname: &str, feature: &mut Array) -> Result<(), String> {
		let _ = cname;
		let mut values = feature.iter().cloned().collect::<Vec<_>>();

		for i in (0..values.len()).rev() {
			let last: Option<Value> = if i == 0 { None } else { Some(values[i - 1].clone()) };
			let current = &values[i];
			let cur_str = current.as_str().unwrap();

			if let Some(ref last) = last {
				let last_str = last.as_str().unwrap();
				if cur_str < last_str {
					return Err(format!(
						"Cannot de-duplicate: feature is not sorted: {} < {}",
						cur_str, last_str
					))
				}

				if cur_str != last_str {
					if cur_str.replace('?', "") == last_str.replace('?', "") {
						return Err(format!("feature '{fname}': conflicting ? for '{cur_str}'"))
					}
					continue
				}

				// TODO merge the comments
				let prefix = current.decor().prefix().unwrap().as_str().unwrap();
				let suffix = current.decor().suffix().unwrap().as_str().unwrap();
				if !prefix.trim().is_empty() || !suffix.trim().is_empty() {
					return Err(format!("feature '{fname}': has a comment '{cur_str}'"))
				}

				values.remove(i);
				log::debug!("Removed duplicate from '{cname}' / '{fname}'");
			}
		}

		feature.clear();
		for value in values {
			feature.push_formatted(value.clone());
		}
		Ok(())
	}