gistfile1.txt

<?php
/**
* This code is missing: 
*    -a way to inject the dependecy for Motor
*    -a way to accept multiple kinds of Motors as a dependecy
**/
class Coche
{
    /**
    * @var Motor
    **/
    protected $motor;
       
    public function arrancar()
    {
        $this->motor->encender();
    }   
}