ProviderBase::packageContent

protected function packageContent($content): ?string
{
	$result = null;
	if (is_array($content))
	{
		try
		{
			$result = Json::encode($content);
		}
		catch (ArgumentException $e)
		{
			$result = null;
			$this->addError('ERROR_JSON_ENCODE', '');

		}
	}
	elseif (is_string($content))
	{
		$result = $content;
	}

	return $result;
}