IPersistentState
Represents persistent state of local cluster member
required by Raft consensus protocol.
Reads Term value associated with the local member
from the persistent storage.
Suspens the caller until the log entry with term equal to Term
will be committed.
Increments Term value.
Determines whether the local member granted its vote for the specified remote member.
Persists the last actual Term.
Persists the item that was voted for on in the last vote.