code: def store_relation(self, src, name, dst):
          ''' use this to store a relation between two objects '''
          self.__require_string__(name)
          #print('storing relation', src, name, dst)
          # make sure both items are stored
          self.store_item(src).link(name, self.store_item(dst)f store_relation(self, src, name, dst):
          ''' use this to store a relation between two objects '''
          self.__require_string__(name)
          #print('storing relation', src, name, dst)
          # make sure both items are stored
          self.store_item(src).link(name, self.store_item(dst))
docs: use this to store a relation between two objects