/**
* @param Answer $answer
*/
public function removeAnswer(Answer $answer)
{
$this->answers->removeElement($answer);
}
/**
* @param Category $category
*/
public function removeCategory(Category $category)
{
$this->categories->removeElement($category);
}
/**
* @param Question $question
*/
public function removeQuestion(Question $question)
{
$this->questions->removeElement($question);
}
