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: symbol.rs
    path of file: ./repos/whisper/whisper_ir/src
    
    the code of the file until where you have to start completion: use ::{
    failure::Fail,
    im::Vector,
    parking_lot::RwLock,
    std::{
        collections::HashMap,
        fmt,
        marker::PhantomPinned,
        mem,
        ops::{Deref, Index},
        ptr,
        sync::Arc,
    },
};

whisper_codegen::reserved_symbols! {
    symbol::Atom, atom!;

    // Root scopes. It's very important these be in order because currently
    // the order defines their
    
    // fn resolve_symbol(&mut self, symbol: &Symbol) -> SymbolIndex {
    //     assert!(symbol.scope().is_reserved() || self.is_owner_of(symbol.scope()));

    //     // If it's a reserved symbol, try the builtin hashmap first.
    //     if symbol.scope.is_reserved() {
    //         if let Some(idx) = self.builtins_to.get(symbol).copied() {
    //             return idx;
    //         }
    //     }

    //     let to = &mut self.to;
    //     let to_symbol = &mut self.to_symbol;

    //     *to.entry(symbol.clone()).or_insert_with(|| {
    //         let i = to_symbol.len() + NUM_BUILTINS;
    //         to_symbol.push(symbol.clone());
    //         SymbolIndex(i)
    //     })
    // }