public default LayoutModelIterator iterator(BigInteger startIndex) {
		return new LayoutModelIterator(this, startIndex);
	}
Returns an iterator that walks all the Layout items in this model, starting at the
specified index.

@param startIndex start index in the model to beginning iterating
@return new iterator
Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/LayoutModel.java