AjaxProcessor::prepareResponseError

protected function prepareResponseError(Result $result): string
{
	$response = '';

	if (!$result->isSuccess())
	{
		$response = implode(', ', $result->getErrorMessages());
	}

	if ($result->hasWarnings() && $this->showWarnings)
	{
		$warningString = implode(', ', $result->getWarningMessages());

		if (empty($response))
		{
			$response = $warningString;
		}
		else
		{
			$response .= ', '.$warningString;
		}
	}

	return $response;
}