default CompletableFuture<HRegionLocation> getRegionLocation(byte[] row, boolean reload) {
    return getRegionLocation(row, RegionInfo.DEFAULT_REPLICA_ID, reload);
  }
Finds the region on which the given row is being served.
<p/>
Returns the location of the region to which the row belongs.
@param row    Row to find.
@param reload true to reload information or false to use cached information
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableRegionLocator.java