/**
* {@inheritdoc}
*/
public function toArray()
{
return ['field' => $this->id] + parent::toArray();
}
public function toArray($filterVariableContent = false, &$filtered = array())
{
$data = parent::toArray($filterVariableContent, $filtered);
$data['mathML'] = $this->mathML;
$data['annotations'] = $this->annotations;
return $data;
}
/**
* {@inheritdoc}
*/
public function toArray()
{
return ['items' => $this->itemsToArray()] + parent::toArray();
}