private Table getMetaTable() throws IOException {
    return master.getConnection().getTable(TableName.META_TABLE_NAME);
  }
Performs an atomic multi-mutate operation against the given table. Used by the likes of merge
and split as these want to make atomic mutations across multiple rows.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateStore.java