Preference a DTO interface to a model in Magento

While we created a DTO object, and then implemented it into our model, we still need to set this model up as a preference for this interface. If someone wishes to reference this PostInterface with dependency injection, Magento won’t yet know which class to substitute in for this interface.

Class preferences are defined in an etc/di.xmlfile, so let’s go ahead and created this. Then, we will define the root config node which uses the noNamespaceSchemaLocation of ObjectManager’s config.xsd.

<?xml version="1.0"?>
<config xmlns:xsi="http://w...