@Override
  protected PeerSyncReplicationStateTransitionState getState(int stateId) {
    return PeerSyncReplicationStateTransitionState.forNumber(stateId);
  }
The procedure for transit current sync replication state for a synchronous replication peer.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/TransitPeerSyncReplicationStateProcedure.java