<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/ObjectManager/etc/config.xsd">
    <preference for="Magento\Theme\Block\Html\Breadcrumbs" type="Custom\Theme\Block\Html\Breadcrumbs" />
</config>