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: hash.rs
    path of file: ./repos/artichoke/artichoke-backend/src/convert
    
    the code of the file until where you have to start completion: use std::collections::HashMap;

use crate::convert::{BoxUnboxVmValue, UnboxRubyError};
use crate::core::{TryConvertMut, Value as _};
use crate::error::Error;
use crate::extn::core::array::Array;
use crate::sys;
use crate::types::{Ruby, Rust};
use crate::value::Value;
use crate::Artichoke;

impl TryConvertMut<Vec<(Value, Value)>, Value> for Artichoke {
    type Error = Error;

    fn try_convert_mut(&mut se
    
    fn try_convert_mut(&mut self, value: Vec<(Vec<u8>, Vec<i64>)>) -> Result<Value, Self::Error> {
        let capa = sys::mrb_int::try_from(value.len()).unwrap_or_default();

        let hash = unsafe { self.with_ffi_boundary(|mrb| sys::mrb_hash_new_capa(mrb, capa))? };
        let hash = self.protect(Value::from(hash));

        for (key, val) in value {
            let key = self.try_convert_mut(key)?;
            let val = self.try_convert_mut(val)?;
            unsafe {
                self.with_ffi_boundary(|mrb| sys::mrb_hash_set(mrb, hash.inner(), key.inner(), val.inner()))?;
            }
        }
        Ok(hash)
    }