private void verifyAllData() throws Exception {
    for (int i = 0; i < numBatchesWritten; ++i) {
      verifyTestDataBatch(tableName, i);
    }
  }
A zero-based index of the current batch of test data being written
hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestChangingEncoding.java