Thank you for the wonderful library.
I really like hashicorp's OSS because it's simple and robust.

By the way, I want to know that FSM.Apply has completed on the majority of nodes after FSM.Apply has been called.
Is there this way?

Specific cases where this might be necessary include.

Assume that immediately after FSM.Apply writes data, the leader node crashes and the leader is transferred to another no.
In this case, we assume that to avoid losing data written by FSM.Apply, we might wait for FSM.Apply to be called on a large number of nodes.