Gc\Core\Object::hasData PHP Method

    public function hasData($key = '')
    {
        if (empty($key) || !is_string($key)) {
            return !empty($this->data);
        }
        return array_key_exists($key, $this->data);
    }

 /**
  * Test
  *
  * @return void
  */
 public function testHasFakeData()
 {
     $this->assertFalse($this->object->hasData(''));
 }