private boolean findNext() {
		while (it.hasNext()) {
			T t = it.next();
			if (filter.test(t)) {
				nextThing = t;
				return true;
			}
		}
		return false;
	}
Construct a new FilteredIterator.
@param it the iterator to filter
@param filter the filter on T
Ghidra/Framework/Generic/src/main/java/generic/FilteredIterator.java