Returns a new relationship aggregate for the given relationship.

        :param relationship: Instance of
          :class:`everest.entities.relationship.DomainRelationship`.

def make_relationship_aggregate(self, relationship):
        """
        Returns a new relationship aggregate for the given relationship.

        :param relationship: Instance of
          :class:`everest.entities.relationship.DomainRelationship`.
        """
        if not self._session.IS_MANAGING_BACKREFERENCES:
            relationship.direction &= ~RELATIONSHIP_DIRECTIONS.REVERSE
        return RelationshipAggregate(self, relationship)