Libraries which containing the PHP class UpdateSmsCampaign

Solve: PHP Fatal error: Uncaught Error: Class "UpdateSmsCampaign" not found

SendinBlue\Client\Model\UpdateSmsCampaign

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This class belongs to the vendor Sendinblue and the package Api-v3-sdk

Brevo\Client\Model\UpdateSmsCampaign

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This class belongs to the vendor Getbrevo and the package Brevo-php

WPMailSMTP\Vendor\SendinBlue\Client\Model\UpdateSmsCampaign

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This class belongs to the vendor Dev-temp and the package Plugins