JsonField::tryUnpack

public function tryUnpack()
{
	$result = new MainResult();
	try
	{
		$value = MainWebJson::decode($this->packedValue);
		if (!$value)
		{
			$result->addError(new MainError('Unavailable value for unpacking'));
		}
	}
	catch (Exception $e)
	{
		$result->addError(new MainError('Unavailable value for unpacking'));
	}

	return $result;
}