/** * @param SessionLearningMaterialInterface $learningMaterial */ public function addLearningMaterial(SessionLearningMaterialInterface $learningMaterial) { if (!$this->learningMaterials->contains($learningMaterial)) { $this->learningMaterials->add($learningMaterial); } }
/** * @param SessionLearningMaterialInterface $sessionLearningMaterial */ public function removeSessionLearningMaterial(SessionLearningMaterialInterface $sessionLearningMaterial) { if ($this->sessionLearningMaterials->contains($sessionLearningMaterial)) { $this->sessionLearningMaterials->removeElement($sessionLearningMaterial); $sessionLearningMaterial->removeMeshDescriptor($this); } }