code: function getDynamoDBEventSourceTableNameAndStreamTimestamp(record) {
    if (record && record.eventSourceARN) {
      const resources = arns.getArnResources(record.eventSourceARN);
      return [resources.resource, resources.subResource];
    }
    return ['', ''];
  }
docs: Extracts and returns an arrays containing the table name followed by the stream timestamp/suffix from the given
  DynamoDB stream event record's eventSourceARN (if any); otherwise returns an array of 2 empty strings.
  
  Example of a DynamoDB stream event source ARN:
  arn:aws:dynamodb:us-east-1:111111111111:table/test/stream/2020-10-10T08:18:22.385
  where 'test' is the name of the table and '2020-10-10T08:18:22.385' is the stream timestamp/suffix
  
  @param {DynamoDBEventRecord|*} record - a DynamoDB stream event record
  @returns {[string, string]} an array containing the table name (if any or empty) followed by an empty string followed
  by the stream timestamp/suffix (if any or empty)