- | | \ /
-(as RoutingMessageHandler) v v
- \ -------------------- ---------
- -----------------> | NetGraphMsgHandler | | Event |
- -------------------- ---------
+ | ^ \ / |
+(as RoutingMessageHandler) | v v
+ \ ---------------------- --------- -----------------
+ -----------------> | NetGraphMsgHandler | | Event | | chain::Filter |
+ ---------------------- --------- -----------------