+ /**
+ * Used to indicate that a channel_announcement and channel_update should be broadcast to all
+ * peers (except the peer with node_id either msg.contents.node_id_1 or msg.contents.node_id_2).
+ *
+ * Note that after doing so, you very likely (unless you did so very recently) want to call
+ * ChannelManager::broadcast_node_announcement to trigger a BroadcastNodeAnnouncement event.
+ * This ensures that any nodes which see our channel_announcement also have a relevant
+ * node_announcement, including relevant feature flags which may be important for routing
+ * through or to us.
+ */