@Override
	public CodeBlock next() throws CancelledException {
		if (nextBlock == null) {
			hasNext();
		}
		CodeBlock retBlock = nextBlock;
		nextBlock = null;
		return retBlock;
	}
@see ghidra.program.model.block.CodeBlockIterator#next()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/block/SimpleBlockIterator.java