FuturisticIdea.php

<?php

namespace AppBundle\Services;

use AppBundle\Entity\AnEntityRepo;
use AppBundle\Services\OtherService;
use AppBundle\Services\ThirdService;

class Features
{
    protected $entityRepo : AnEntityRepo;
    protected $otherService : OtherService;
    protected $thirdService : ThirdService;
    
    //...
}

SymfonyConstructors.php

<?php

namespace AppBundle\Services;

use AppBundle\Entity\AnEntityRepo;
use AppBundle\Services\OtherService;
use AppBundle\Services\ThirdService;

class Features
{
    protected $entityRepo;
    protected $otherService;
    protected $thirdService;

    public function __construct(
        AnEntityRepo $entityRepo,
        OtherService $otherService,
        ThirdService $thirdService
    ) {
        $this->entityRepo = $entityRepo;
        $this->otherService = $otherService;
        $this->thirdService = $thirdService;
    }
    
    //...
}