presto-main/src/main/java/io/prestosql/operator/index/FieldSetFilteringRecordSet.java/FieldSetFilteringRecordSet/fieldSetsEqual
class FieldSetFilteringRecordSet:        private static boolean fieldSetsEqual(RecordCursor cursor, List<Set<Field>> fieldSets)
        {
            for (Set<Field> fieldSet : fieldSets) {
                if (!fieldsEquals(cursor, fieldSet)) {
                    return false;
                }
            }
            return true;
        }