Speed::addData

public function addData($field, $data)
{
	if (!is_array($data))
	{
		$data = [$data];
	}
	if (
		$this->fields[$field]
		&& ($hookData = $this->fields[$field]->getValue())
	)
	{
		$mergedData = array_unique(array_merge(unserialize($hookData, ['allowed_classes' => false]), $data));
	}
	else
	{
		$mergedData = $data;
	}

	return serialize($mergedData);
}