Illuminate\Database\Eloquent\Model::__isset PHP Method

    public function __isset($key)
    {
        return !is_null($this->getAttribute($key));
    }

 /**
  * Check if an attribute exists.
  *
  * @param string $key
  * @return bool
  */
 public function __isset($key)
 {
     return in_array($key, $this->translatedAttributes) || parent::__isset($key);
 }