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: transactions_pool.rs
    path of file: ./repos/parity-ethereum/rpc/src/v1/impls
    
    the code of the file until where you have to start completion: use std::sync::{Arc, Weak};

use jsonrpc_core::Result;
use jsonrpc_core::futures::Future;
use jsonrpc_pubsub::{SubscriptionId, typed::{Sink, Subscriber}};

use v1::helpers::Subscribers;
use v1::metadata::Metadata;
use v1::traits::TransactionsPool;

use miner::pool::TxStatus;
use parity_runtime::Executor;
use parking_lot::RwLock;
use ethereum_types::H256;
use futures::{Stream, s
    
	pub fn new(executor: Executor, pool_receiver: mpsc::UnboundedReceiver<Arc<Vec<(H256, TxStatus)>>>) -> Self {
		let transactions_pool_subscribers = Arc::new(RwLock::new(Subscribers::default()));
		let handler = Arc::new(
			TransactionsNotificationHandler::new(
				executor.clone(),
				transactions_pool_subscribers.clone(),
			)
		);
		let handler2 = Arc::downgrade(&handler);

		executor.spawn(pool_receiver
			.for_each(move |tx_status| {
				if let Some(handler2) = handler2.upgrade() {
					handler2.notify_transaction(tx_status);
				}
				Ok(())
			})
			.map_err(|e| warn!("Key server listener error: {:?}", e))
		);

		TransactionsPoolClient {
			handler,
			transactions_pool_subscribers,
		}
	}