code: def disconnect(self, node):
          
          rel = _rel_helper(lhs='a', rhs='b', ident='r', **self.definition)
          q = "MATCH (a), (b) WHERE id(a)={self} and id(b)={them} " \
              "MATCH " + rel + " DELETE r"
          self.source.cypher(q, {'them': node.id})
docs: Disconnect a node
  
          :param node:
          :return: