gistfile1.php

if($projects = $service->getProjects()){
//if($projects = $this->projectRepository->getAllProjectsByService($service)){
	foreach($projects as $project){
		foreach($project->getSlides() as $slide)
		$slidearray[] = $this->formatSlide($slide);
	}
}		

gistfile2.php

	/**
	 * getAllProjectsByService
	 *
	 * @param \Foo\Domain\Model\Service $service
	 * @return
	 */
	public function getAllProjectsByService(\Foo\Domain\Model\Service $service) {
		$query = $this->createQuery();
		$query->getQuerySettings()->setRespectEnableFields(false);
		 $query->matching($query->contains('service',$service));
		 DebuggerUtility::var_dump($query);
		return->execute();
	}