Helo.configure do |config|
  config.access_token = "YOUR_BEARER_TOKEN"
end

send_message_batch_request = Helo::SendMessageBatchRequest.new(
  requests: []
)
Helo::Sending.transactional_batch(send_message_batch_request)

{
  "responses": [
    {
      "status": "<string>",
      "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "suppressions": [
        "<string>"
      ]
    }
  ]
}