@Override
		public Vertex next() throws ConcurrentModificationException {
			if (setModificationNumber != getModificationNumber()) {
				throw new ConcurrentModificationException("Set Modified");
			}
			if (nextPosition < capacity()) {
				currentPosition = nextPosition;
				getNextPosition();
				return getByIndex(currentPosition);
			}
			throw new NoSuchElementException();
		}
Return the next Vertex in the iteration
Ghidra/Framework/Generic/src/main/java/ghidra/util/graph/VertexSet.java