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: main.rs
    path of file: ./repos/oxc/crates/oxc_language_server/src
    
    the code of the file until where you have to start completion: mod linter;
mod options;

use crate::linter::{DiagnosticReport, ServerLinter};
use globset::Glob;
use ignore::gitignore::Gitignore;
use log::{debug, error, info};
use oxc_linter::{LintOptions, Linter};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::fmt::Debug;
use std::path::PathBuf;
use std::str::FromStr;

use dashmap::DashMap;
use futures::future::join_all;
use tokio::sync::{Mutex, OnceCell, RwLock, SetError};
use tower_lsp::jsonrpc::{Error, ErrorCode, Result};
use tower_lsp::lsp_types::{
    CodeAction, CodeActionKind, CodeActionOptions, CodeActionOrCommand, CodeActionParams,
    CodeActionProviderCapability, CodeActionResponse, ConfigurationItem, Diagnostic,
    DidChangeConfigurationParams, DidChangeTextDocumentParams, DidCloseTextDocumentParams,
    DidOpenTextDocumentParams, DidSaveTextDocumentParams, InitializeParams, InitializeResult,
    InitializedParams, OneOf, ServerCapabilities, ServerInfo, TextDocumentSyncCapability,
    TextDocumentSyncKind, TextEdit, Url, WorkDoneProgressOptions, WorkspaceEdit,
    WorkspaceFoldersServerCapabilities, WorkspaceServerCapabilities,
};
use tower_lsp::{Client, LanguageServer, LspService, Server};

#[derive(Debug)]
struct Backend {
    client: Client,
    root_uri: OnceCell<Option<Url>>,
    server_linter: RwLock<ServerLinter>
    
    async fn initialize(&self, params: InitializeParams) -> Result<InitializeResult> {
        self.init(params.root_uri)?;
        self.init_ignore_glob().await;
        let options = params.initialization_options.and_then(|mut value| {
            let settings = value.get_mut("settings")?.take();
            serde_json::from_value::<Options>(settings).ok()
        });

        if let Some(value) = options {
            info!("initialize: {:?}", value);
            info!("language server version: {:?}", env!("CARGO_PKG_VERSION"));
            *self.options.lock().await = value;
        }
        self.init_linter_config().await;
        Ok(InitializeResult {
            server_info: Some(ServerInfo { name: "oxc".into(), version: None }),
            offset_encoding: None,
            capabilities: ServerCapabilities {
                text_document_sync: Some(TextDocumentSyncCapability::Kind(
                    TextDocumentSyncKind::FULL,
                )),
                workspace: Some(WorkspaceServerCapabilities {
                    workspace_folders: Some(WorkspaceFoldersServerCapabilities {
                        supported: Some(true),
                        change_notifications: Some(OneOf::Left(true)),
                    }),
                    file_operations: None,
                }),
                code_action_provider: Some(CodeActionProviderCapability::Options(
                    CodeActionOptions {
                        code_action_kinds: Some(vec![CodeActionKind::QUICKFIX]),
                        work_done_progress_options: WorkDoneProgressOptions {
                            work_done_progress: None,
                        },
                        resolve_provider: None,
                    },
                )),
                ..ServerCapabilities::default()
            },
        })
    }