include.php

См. документацию.

<?php
IncludeModuleLangFile(__FILE__);
 
CModule::AddAutoloadClasses(
    'subscribe',
    [
        'Bitrix\\Subscribe\\SenderConnectorSubscriber' => 'lib/senderconnector.php',
        'Bitrix\\Subscribe\\SenderEventHandler' => 'lib/senderconnector.php',
        'CMailTools' => 'classes/general/mailtools.php',
        'CPosting' => 'classes/general/posting.php',
        'CPostingTemplate' => 'classes/general/template.php',
        'CRubric' => 'classes/general/rubric.php',
        'CSubscription' => 'classes/general/subscription.php',
        'subscribe' => 'install/index.php',
    ]
);