How to use the web3-core-subscriptions.NewHeadsSubscription function in web3-core-subscriptions

createTransactionObserver(moduleInstance) {
        if (moduleInstance.currentProvider.supportsSubscriptions()) {
            return new SocketTransactionObserver(
                moduleInstance.currentProvider,
                this.getTimeout(moduleInstance),
                moduleInstance.transactionConfirmationBlocks,
                new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
                new NewHeadsSubscription(this.utils, this.formatters, moduleInstance)
            );
        }

        return new HttpTransactionObserver(
            moduleInstance.currentProvider,
            this.getTimeout(moduleInstance),
            moduleInstance.transactionConfirmationBlocks,
            new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
            new GetBlockByNumberMethod(this.utils, this.formatters, moduleInstance)
        );
    }
}

createTransactionObserver(moduleInstance) {
        if (moduleInstance.currentProvider.supportsSubscriptions()) {
            return new SocketTransactionObserver(
                moduleInstance.currentProvider,
                this.getTimeout(moduleInstance),
                moduleInstance.transactionConfirmationBlocks,
                new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
                new NewHeadsSubscription(this.utils, this.formatters, moduleInstance)
            );
        }

        return new HttpTransactionObserver(
            moduleInstance.currentProvider,
            this.getTimeout(moduleInstance),
            moduleInstance.transactionConfirmationBlocks,
            new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
            new GetBlockByNumberMethod(this.utils, this.formatters, moduleInstance)
        );
    }
}

createTransactionObserver(moduleInstance) {
        if (moduleInstance.currentProvider.supportsSubscriptions()) {
            return new SocketTransactionObserver(
                moduleInstance.currentProvider,
                this.getTimeout(moduleInstance),
                moduleInstance.transactionConfirmationBlocks,
                new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
                new NewHeadsSubscription(this.utils, this.formatters, moduleInstance)
            );
        }

        return new HttpTransactionObserver(
            moduleInstance.currentProvider,
            this.getTimeout(moduleInstance),
            moduleInstance.transactionConfirmationBlocks,
            new GetTransactionReceiptMethod(this.utils, this.formatters, moduleInstance),
            new GetBlockByNumberMethod(this.utils, this.formatters, moduleInstance)
        );
    }
}

getSubscription(moduleInstance, type, options) {
        switch (type) {
            case 'logs':
                return new LogSubscription(
                    options,
                    this.utils,
                    this.formatters,
                    moduleInstance,
                    new GetPastLogsMethod(this.utils, this.formatters, moduleInstance)
                );
            case 'newBlockHeaders':
                return new NewHeadsSubscription(this.utils, this.formatters, moduleInstance);
            case 'pendingTransactions':
                return new NewPendingTransactionsSubscription(this.utils, this.formatters, moduleInstance);
            case 'syncing':
                return new SyncingSubscription(this.utils, this.formatters, moduleInstance);
            case 'accountsChanged':
                return new AccountsChangedSubscription(this.utils, this.formatters, moduleInstance);
            case 'networkChanged':
                return new NetworkChangedSubscription(this.utils, this.formatters, moduleInstance);
            case 'chainChanged':
                return new ChainChangedSubscription(this.utils, this.formatters, moduleInstance);
            default:
                throw new Error(`Unknown subscription: ${type}`);
        }
    }
}