I am moving a Symfony 3.2 project to Symfony 3.3 and I would like to use DI new features. I have read the docs but so far I can make this to work. See the following class definition:

    use Http\Adapter\Guzzle6\Client;
    use Http\Message\MessageFactory;

    abstract class AParent
    {
        protected $message;
        protected $client;
        protected $api_count_url;
    
        public function __construct(MessageFactory $message, Client $client, string $api_count_url)
        {
            $this->message       = $message;
            $this->client        = $client;
            $this->api_count_url = $api_count_url;
        }
    
        public function getCount(string $source, string $object, MessageFactory $messageFactory, Client $client): ?array
        {
            // .....
        }
    
        abstract public function execute(string $source, string $object, int $qty, int $company_id): array;
        abstract protected function processDataFromApi(array $entities, int $company_id): array;
        abstract protected function executeResponse(array $rows = [], int $company_id): array;
    }
    
    class AChildren extends AParent
    {
        protected $qty;
    
        public function execute(string $source, string $object, int $qty, int $company_id): array
        {
            $url      = $this->api_count_url . "src={$source}&obj={$object}";
            $request  = $this->message->createRequest('GET', $url);
            $response = $this->client->sendRequest($request);
        }
    
        protected function processDataFromApi(array $entities, int $company_id): array
        {
            // ....
        }
    
        protected function executeResponse(array $rows = [], int $company_id): array
        {
            // ....
        }
    }

This is how my app/config/services.yml file looks like:

    parameters:
        serv_api_base_url: 'https://url.com/api/'
    
    services:
        _defaults:
            autowire: true
            autoconfigure: true
            public: false
        
        CommonBundle\:
            resource: '../../src/CommonBundle/*'
            exclude: '../../src/CommonBundle/{Entity,Repository}'
        
        CommonBundle\Controller\:
            resource: '../../src/CommonBundle/Controller'
            public: true
            tags: ['controller.service_arguments']
        
        # Services that need manually wiring: API related
        CommonBundle\API\AParent:
            arguments:
                $api_count_url: '%serv_api_base_url%'

But I am getting the following error:

AutowiringFailedException Cannot autowire service
"CommonBundle\API\AChildren": argument "$api_count_url" of method
"__construct()" must have a type-hint or be given a value explicitly.

Certainly I am missing something here or simply this is not possible which leads me to the next question: is this a poor OOP design or it's a missing functionality from the Symfony 3.3 DI features?

Of course I don't want to make the AParent class an interface since I do not want to redefine the methods on the classes implementing such interface.

Also I do not want to repeat myself and copy/paste the same functions all over the children.

After read "How to Manage Common Dependencies with Parent Services" I have tried the following in my scenario:

    CommonBundle\API\AParent:
        abstract: true
        arguments:
            $api_count_url: '%serv_api_base_url%'

    CommonBundle\API\AChildren:
        parent: CommonBundle\API\AParent
        arguments:
            $base_url: '%serv_api_base_url%'
            $base_response_url: '%serv_api_base_response_url%' 

But the error turns into:

Attribute "autowire" on service "CommonBundle\API\AChildren" cannot be
inherited from "_defaults" when a "parent" is set. Move your child
definitions to a separate file or define this attribute explicitly in
/var/www/html/oneview_symfony/app/config/services.yml (which is being
imported from "/var/www/html/oneview_symfony/app/config/config.yml").

However I could make it to work with the following setup:

    CommonBundle\API\AParent:
        arguments:
            $api_count_url: '%serv_api_base_url%'

    CommonBundle\API\AChildren:
        arguments:
            $api_count_url: '%serv_api_base_url%'
            $base_url: '%serv_api_base_url%'
            $base_response_url: '%serv_api_base_response_url%'

I have tried this third way to achieve this but it didn't work either since the objects arrive NULL to the child class:

// services.yml
services:
    CommonBundle\EventListener\EntitySuscriber:
        tags:
            - { name: doctrine.event_subscriber, connection: default}

    CommonBundle\API\AParent:
        abstract: true
        arguments:
            - '@httplug.message_factory'
            - '@httplug.client.myclient'
            - '%ser_api_base_url%'

// services_api.yml
services:
    CommonBundle\API\AChildren:
        parent: CommonBundle\API\AParent
        arguments:
            $base_url: '%serv_api_base_url%'
            $base_response_url: '%serv_api_base_response_url%'

// config.yml
imports:
    - { resource: parameters.yml }
    - { resource: security.yml }
    - { resource: services.yml }
    - { resource: services_api.yml }

Why the objects are NULL in the child class?

What is the right way to achieve this inheritance from DI? Advice? Is this possible? Is this a bug?