intoBitSet

Load doc IDs into a FixedBitSet. This should behave exactly as if implemented as below, which is the default implementation:

for (int doc = docID(); doc < upTo; doc = nextDoc()) {
bitSet.set(doc - offset);
}

Note: offset must be less than or equal to the .docID. Behaviour is undefined if this iterator is unpositioned.

Note: It is important not to clear bits from bitSet that may be already set.

Note: offset may be negative.