Proposal for ZF2

AbstractServiceManagerAware.php

<?php
namespace Zend\ServiceManager;

class AbstractServiceManagerAware implements ServiceLocatorAwareInterface
{

    /**
     *
     * @var ServiceLocatorInterface
     */
    protected $serviceLocator;

    /**
     * Set serviceManager instance
     *
     * @param ServiceLocatorInterface $serviceLocator            
     * @return void
     */
    public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
    {
        $this->serviceLocator = $serviceLocator;
        return $this;
    }

    /**
     * Retrieve serviceManager instance
     *
     * @return ServiceLocatorInterface
     */
    public function getServiceLocator()
    {
        return $this->serviceLocator;
    }
}

MyService.php

<?php
namespace MyModule\Services;

use Zend\ServiceManager\AbstractServiceManagerAware;

class MyService extends AbstractServiceManagerAware
{
    public function doSomething(){
        $otherSerice = $this->getServiceLocator()->get('myOtherSerice');
    }
}