stackoverflow_answer_sm.php

<?php

 class yourclass implements ServiceLocatorAwareInterface
   {
    protected $serviceLocator;

 
    public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
    {
        $this->serviceLocator = $serviceLocator;
    }
    
    public function getServiceLocator()
    {
        return $this->serviceLocator;
    }
    public function somefunction(){
      $config = $this->getServiceLocator()->get('config');

   }
}