docs: def get_relationships_for_source(self, source_id):
          """Gets a ``RelationshipList`` corresponding to the given peer ``Id``.
  
          arg:    source_id (osid.id.Id): a peer ``Id``
          return: (osid.relationship.RelationshipList) - the relationships
          raise:  NullArgument - ``source_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for
          # osid.relationship.RelationshipLookupSession.get_relationships_for_source
          # NOTE: This implementation currently ignores plenary and effective views
          collection = JSONClientValidated('relationship',
                                           collection='Relationship',
                                           runtime=self._runtime)
          result = collection.find(
              dict({'sourceId': str(source_id)},
                   **self._view_filter())).sort('_sort_id', ASCENDING)
          return objects.RelationshipList(result, runtime=self._runtime)