text: // Copyright 2021 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  
  'use strict';
  
  function main(readPosition) {
    // [START bigquerystorage_v1beta1_generated_BigQueryStorage_ReadRows_async]
    /**
     * TODO(developer): Uncomment these variables before running the sample.
     */
    /**
     *  Required. Identifier of the position in the stream to start reading from.
     *  The offset requested must be less than the last row read from ReadRows.
     *  Requesting a larger offset is undefined.
     */
    // const readPosition = ''
  
    // Imports the Storage library
    const {BigQueryStorageClient} = require('@google-cloud/bigquery-storage').v1beta1;
  
    // Instantiates a client
    const storageClient = new BigQueryStorageClient();
  
    async function readRows() {
      // Construct request
      const request = {
        readPosition,
      };
  
      // Run request
      const stream = await storageClient.readRows(request);
      stream.on('data', (response) => { console.log(response) });
      stream.on('error', (err) => { throw(err) });
      stream.on('end', () => { /* API call completed */ });
    }
  
    readRows();
    // [END bigquerystorage_v1beta1_generated_BigQueryStorage_ReadRows_async]
  }
  
  process.on('unhandledRejection', err => {
    console.error(err.message);
    process.exitCode = 1;
  });
  main(...process.argv.slice(2));
  