<?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="sales_order_invoice_save_before">
        <observer name="fgc_sales_order_invoice_save_before" instance="FGCT\OverrideCreateInvoice\Observer\OrderInvoiceSaveBefore" />
    </event>
    <event name="sales_order_invoice_save_after">
        <observer name="fgc_sales_order_invoice_save_after" instance="FGCT\OverrideCreateInvoice\Observer\OrderInvoiceSaveAfter" />
    </event>
</config>