ElggMenuItem::setData PHP Method

    public function setData($key, $value = null)
    {
        if (is_array($key)) {
            $this->data = array_merge($this->data, $key);
        } else {
            $this->data[$key] = $value;
        }
    }

 public function testSetDataWithArray()
 {
     $item = new \ElggMenuItem('name', 'text', 'url');
     $item->setData(array('priority' => 88, 'new' => 64));
     $this->assertEquals(88, $item->getData('priority'));
     $this->assertEquals(88, $item->getPriority());
     $this->assertEquals(64, $item->getData('new'));
 }