public ClosableIterator<Long[]> getFourthIndex(Long first, Long second, Long third) {
return new EntryIteratorFixedLengthLongArray(QUIN, btree, first, second, third);
}
public ClosableIterator<Long> getFifthIndex(Long first, Long second, Long third, Long fourth) {
return new EntryIteratorFourFixedOneArray(first, second, third, fourth, btree);
}