events.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_entity_attribute_save_before">
        <observer name="weee" instance="Magento\Weee\Observer\AssignBackendModelToAttributeObserver" />
    </event>
    <event name="catalog_product_option_price_configuration_after">
        <observer name="weee" instance="Magento\Weee\Observer\GetPriceConfigurationObserver"/>
    </event>
    <event name="catalog_product_view_config">
        <observer name="weee" instance="Magento\Weee\Observer\UpdateProductOptionsObserver" />
    </event>
    <event name="payment_cart_collect_items_and_amounts">
        <observer name="magento_weee" instance="Magento\Weee\Observer\AddPaymentWeeeItem" />
    </event>
</config>