code: function removeSubscriber (args, token) {
      var
        topics = args.topics,
        suspendSubs = args.suspend;
  
      if (typeof token === 'string') {
        return !!applyTopicDescendents(
          suspendSubs ? suspendTopic : empty, 'subscriptions', token, topics
        );
      }
  
      var node = ancestorTopicSearch(token.topic, topics);
      if (node.topic !== token.topic) {
        return false;
      }
  
      var i = searchAround(
        getId, getPriority,
        token.id, token.priority,
        binaryIndexBy(getPriority, token.priority, node.subscriptions),
        node.subscriptions
      );
  
      if (i === -1) {
        return false;
      }
  
      if (suspendSubs) {
        return !!suspendNode(node.subscriptions[i]);
      }
  
      return !!node.subscriptions.splice(i, 1);
    }
docs: Finds the subscription associated with a token and removes or suspends is. If the subscription associated with a token cannot be found then this returns false. This usually means that the token was already removed.