<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
        <event name="email_order_set_template_vars_before">
            <observer name="bl_order_save_email_variables" 
                instance="BlueLogic\CustomShippingMethod\Observer\Sales\SaveOrderEmailVariables"/>
        </event>
</config>
