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: client.rs
    path of file: ./repos/nearcore/chain/client/src/test_utils
    
    the code of the file until where you have to start completion: // FIXME(nagisa): Is there a good reason we're triggering this? Luckily though this is just test
// code so we're in the clear.
#![allow(clippy::arc_with_non_send_sync)]

use std::mem::swap;
use std::sync::{Arc, RwLock};

use crate::client::ProduceChunkResult;
use crate::Client;
use actix_rt::{Arbiter, System};
use itertools::Itertools;
use near_async::futures::ActixArbiterHandleFutureSpawner;
use near_async::messaging::{noop, IntoSender, Sender};
use near_chain::chain::{do_apply_chunks, BlockCatchUpRequest};
use near_chain::resharding::ReshardingRequest;
use near_chain::test_utils::{wait_for_all_blocks_in_processing, wait_for_block_in_processing};
use near_chain::{Chain, ChainStoreAccess, Provenance};
use near_client_primitives::types::Error;
use near_network::types::HighestHeightPeerInfo;
use near_primitives::block::Block;
use near_primitives::hash::CryptoHash;
use near_primitives::merkle::{merklize, PartialMerkleTree};
use near_primitives::sharding::{EncodedShardChunk, ReedSolomonWrapper, ShardChunk};
use near_primitives::stateless_validation::Ch
    
    pub fn produce_one_chunk(&mut self, height: BlockHeight, shard_id: ShardId) -> ShardChunk {
        let ProduceChunkResult {
            chunk: encoded_chunk,
            encoded_chunk_parts_paths: merkle_paths,
            receipts,
            transactions_storage_proof,
        } = create_chunk_on_height_for_shard(self, height, shard_id);
        let shard_chunk = self
            .persist_and_distribute_encoded_chunk(
                encoded_chunk,
                merkle_paths,
                receipts,
                self.validator_signer.as_ref().unwrap().validator_id().clone(),
            )
            .unwrap();
        let prev_block = self.chain.get_block(shard_chunk.prev_block()).unwrap();
        let prev_chunk_header = Chain::get_prev_chunk_header(
            self.epoch_manager.as_ref(),
            &prev_block,
            shard_chunk.shard_id(),
        )
        .unwrap();
        self.send_chunk_state_witness_to_chunk_validators(
            &self.epoch_manager.get_epoch_id_from_prev_block(shard_chunk.prev_block()).unwrap(),
            prev_block.header(),
            &prev_chunk_header,
            &shard_chunk,
            transactions_storage_proof,
        )
        .unwrap();
        shard_chunk
    }