@Override
  protected void restoreSucceedState(AssignmentManager am, RegionStateNode regionNode, long seqId)
    throws IOException {
    if (regionNode.getState() == State.CLOSED) {
      // should have already been persisted, ignore
      return;
    }
    am.regionClosedWithoutPersistingToMeta(regionNode);
  }
The remote procedure used to close a region.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/CloseRegionProcedure.java