def getPrioritySortkey(self):
        """
        Returns the key that will be used to sort the current Analysis, from
        most prioritary to less prioritary.
        :return: string used for sorting
        """
        analysis_request = self.getRequest()
        if analysis_request is None:
            return None
        ar_sort_key = analysis_request.getPrioritySortkey()
        ar_id = analysis_request.getId().lower()
        title = sortable_title(self)
        if callable(title):
            title = title()
        return '{}.{}.{}'.format(ar_sort_key, ar_id, title)
Returns the key that will be used to sort the current Analysis, from
        most prioritary to less prioritary.
        :return: string used for sorting