How to use the @zilliqa-js/account.Wallet function in @zilliqa-js/account

constructor(node: string, websocket: string, provider?: Provider) {
    this.provider = provider || new HTTPProvider(node);
    this.wallet = new Wallet(this.provider);
    this.blockchain = new Blockchain(this.provider, this.wallet);
    this.network = new Network(this.provider, this.wallet);
    this.contracts = new Contracts(this.provider, this.wallet);
    this.transactions = new TransactionFactory(this.provider, this.wallet);
    this.newTxBlockSubscription = new NewTxBlockSubscription(websocket);
  }
}