protected void transitPeerSyncReplicationState(MasterProcedureEnv env)
    throws ReplicationException {
    env.getReplicationPeerManager().transitPeerSyncReplicationState(peerId, toState);
  }
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