code: def get_relationships_by_genus_type_for_destination(self, destination_id=None, relationship_genus_type=None):
          
          if destination_id is None or relationship_genus_type is None:
              raise NullArgument()
          url_path = ('/handcar/services/relationship/families/' +
                      self._catalog_idstr + '/relationships?genustypeid=' +
                      relationship_genus_type.get_identifier + '?sourceid=' +
                      str(destination_id))
          return objects.RelationshipList(self._get_request(url_path))
docs: Gets a ``RelationshipList`` corresponding to the given peer ``Id`` and relationship genus ``Type.
  
          Relationships`` of any genus derived from the given genus are
          returned.
  
          In plenary mode, the returned list contains all of the
          relationships corresponding to the given peer, including
          duplicates, or an error results if a relationship is
          inaccessible. Otherwise, inaccessible ``Relationships`` may be
          omitted from the list and may present the elements in any order
          including returning a unique set.
  
          In effective mode, relationships are returned that are currently
          effective. In any effective mode, effective relationships and
          those currently expired are returned.
  
          arg:    destination_id (osid.id.Id): a peer ``Id``
          arg:    relationship_genus_type (osid.type.Type): a relationship
                  genus type
          return: (osid.relationship.RelationshipList) - the relationships
          raise:  NullArgument - ``destination_id`` or
                  ``relationship_genus_type`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*