/**
* @param Answer $answer
*/
public function addAnswer(Answer $answer)
{
if (null === $answer->getQuestion()) {
$answer->setQuestion($this);
}
$this->answers->add($answer);
}
/**
* @param Category $category
*/
public function addCategory(Category $category)
{
if (null === $category->getCertification()) {
$category->setCertification($this);
}
$this->categories->add($category);
}
/**
* @param Question $question
*/
public function addQuestion(Question $question)
{
if (null === $question->getCategory()) {
$question->setCategory($this);
}
$this->questions->add($question);
}
