Webiny\Component\EventManager\Event::__set PHP Method

    public function __set($name, $value)
    {
        if ($this->isArray($value)) {
            $value = new static($value);
        }
        if ($this->isNull($name)) {
            $this->eventData[] = $value;
        } else {
            $this->eventData[$name] = $value;
        }
    }