@Override
            public boolean evaluate() throws Exception {
              ServerName sn = regionStates.getRegionServerOfRegion(hri);
              return (sn != null && sn.equals(destRS.getServerName()));
            }
Find a RS that has regions of a table.
@param hasMetaRegion when true, the returned RS has hbase:meta region as well
hbase-server/src/test/java/org/apache/hadoop/hbase/master/AbstractTestDLS.java