Factory::obtainSource

static function obtainSource(): ?Source
{
	static $result;
	if (!is_null($result))
	{
		return $result;
	}

	$result = (new RepositorySourceRepository(new SourceOrmConverter()))
		->findByCode(SourceCodePicker::getSourceCode())
	;

	return $result && $result->isAvailable() ? $result : null;
}