(self, domain)
:param domain:
        :return: iterable of tuple(doc_type, list(doc_ids))
:param domain:
        :return: iterable of tuple(doc_type, list(doc_ids))
: param domain : : return : iterable of tuple ( doc_type list ( doc_ids ))
def get_doc_ids(self, domain):
        """
        :param domain:
        :return: iterable of tuple(doc_type, list(doc_ids))
        """
        raise NotImplementedError
def get_doc_ids ( self , domain ) : raise NotImplementedError