Embeddables with inheritance

example.php

<?php
abstract class Framework {
    /**
     * @type bool
     */
    private $installsGlobally;
    
    abstract public function download();
}

class Symfony extends Framework {
    public function download() {
        return 'git clone git@github.com:symfony/symfony.git';
    }
}

class Phalcon extends Framework {
    public function download() {
        return 'pear install phalcon'; // idk
    }
}

class Project {
    /**
     * @type Framework
     */
    private $framework;
    
    /**
     * @type string
     */
    private $name;
    
    /**
     * @type User
     */
    private $owner;
}

example.yml

Framework:
    type: embeddable
    fields:
        installsGlobally: { type: boolean }
    inheritanceType: SINGLE_TABLE
    discriminatorColumn:
        name: discr
        type: string
    discriminatorMap:
        symfony: Symfony
        phalcon: Phalcon

Project:
    embedded:
        framework:
            class: ???

It's a silly example, but I guess the point is clear: Allow inheritance of embeddable types.