code: func (m *GossipMessage) IsChannelRestricted() bool {
  	return m.Tag == GossipMessage_CHAN_AND_ORG || m.Tag == GossipMessage_CHAN_ONLY || m.Tag == GossipMessage_CHAN_OR_ORG
  }
docs: // IsChannelRestricted returns whether this GossipMessage should be routed
  // only in its channel