public void verifyNumericRows(Region region, final byte[] f, int startRow, int endRow)
    throws IOException {
    verifyNumericRows((HRegion) region, f, startRow, endRow);
  }
Load region with rows from 'aaa' to 'zzz'.
@param r     Region
@param f     Family
@param flush flush the cache if true
@return Count of rows loaded.
hbase-testing-util/src/main/java/org/apache/hadoop/hbase/HBaseTestingUtility.java