docs: function getSourceStreamNames(records, context) {
    const getSourceStreamName = isDynamoDBStreamType(context) ?
      record => {
        const [tableName, streamTimestamp] = streamEvents.getDynamoDBEventSourceTableNameAndStreamTimestamp(record);
        return tableName && streamTimestamp ? `${tableName}/${streamTimestamp}` : '';
      } : streamEvents.getKinesisEventSourceStreamName;
  
    return records.map(getSourceStreamName);
  }