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: subscription.rs
    path of file: ./repos/ros2_rust/rclrs/src
    
    the code of the file until where you have to start completion: use std::ffi::CStr;
use std::ffi::CString;
use std::marker::PhantomData;
use std::sync::atomic::AtomicBool;
use std::sync::{Arc, Mutex, MutexGuard};

use rosidl_runtime_rs::{Message, RmwMessage};

use crate::erro
    
    pub fn take_boxed(&self) -> Result<(Box<T>, MessageInfo), RclrsError> {
        let mut rmw_message = Box::<<T as Message>::RmwMsg>::default();
        let message_info = self.take_inner(&mut *rmw_message)?;
        // TODO: This will still use the stack in general. Change signature of
        // from_rmw_message to allow placing the result in a Box directly.
        let message = Box::new(T::from_rmw_message(*rmw_message));
        Ok((message, message_info))
    }