presto-rcfile/src/main/java/io/prestosql/rcfile/RcFileReader.java/RcFileReader/validateWriteRowGroupChecksum
class RcFileReader:    private void validateWriteRowGroupChecksum()
    {
        if (writeChecksumBuilder.isPresent()) {
            writeChecksumBuilder.get().addRowGroup(rowGroupRowCount);
        }
    }