public LongIterator getPropertyIterator(long start, boolean before) {
		return new LongIteratorImpl(this, start, before);
	}
Returns an iterator over the indices having the given property
value.
@param start the starting index for the iterator.
@param before if true the iterator will be positioned before the start value.
Ghidra/Framework/Generic/src/main/java/ghidra/util/map/ValueMap.java