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: precompile.rs
    path of file: ./repos/revm/crates/primitives/src
    
    the code of the file until where you have to start completion: use crate::{Bytes, Env};
use core::fmt;
use dyn_clone::DynClone;
use std::{boxed::Box, string::String, sync::Arc};

/// A precompile operation result.
///
/// Returns either `Ok((gas_used, return_bytes))` or `Err(error)`.
pub type PrecompileResult = Result<(u64, Bytes), PrecompileError>;

pub type StandardPrecompileFn = fn(&Bytes, u64) -> PrecompileResult;
pub type EnvPrecompileFn = fn(&Bytes, u64, env: &Env) -> PrecompileResult;

/// Stateful precompile trait. It is used to create
/// a arc prec
    
    fn stateful_precompile_mut() {
        #[derive(Default, Clone)]
        struct MyPrecompile {}

        impl StatefulPrecompileMut for MyPrecompile {
            fn call_mut(
                &mut self,
                _bytes: &Bytes,
                _gas_price: u64,
                _env: &Env,
            ) -> PrecompileResult {
                PrecompileResult::Err(PrecompileError::OutOfGas)
            }
        }

        let mut p = Precompile::new_stateful_mut(MyPrecompile::default());
        match &mut p {
            Precompile::StatefulMut(p) => {
                let _ = p.call_mut(&Bytes::new(), 0, &Env::default());
            }
            _ => panic!("not a state"),
        }
    }