code: function getKinesisEventSourceStreamName(record) {
    return record && record.eventSourceARN ? arns.getArnResources(record.eventSourceARN).resource : '';
  }
docs: Extracts and returns the stream name from the given Kinesis stream event record's eventSourceARN (if any); otherwise returns
  an empty string.
  @param {KinesisEventRecord|*} record - a Kinesis stream event record
  @returns {string} the stream name (if any) or an empty string