this.checkIds = checkIds;
}
@Override
void eval(Map<String, SeqNumCol> colMap) {
Computation computation = checker.start();
for (String id : checkIds) {
SeqNumCol col = colMap.get(id);
col.eval(colMap);
computation.append(col.data);
}
CheckDigit digit = computation.compute();
toInteger(digit.intValue());
}