Better description of Custome BoxList / Box Sorter

[MarkBFamFour]

I read the Sortation documentation and there is a brief explanation of using a custom class implementation of BoxSorter. While I understand how to build the class and apply it to a BoxList object, there's no guidance on how to make the BoxList apply to the Packer and all ways I have tried to inject it via setBoxes() so far either end up not utilising the custom Sorter at all, or they product a list of zero boxes (at which point the Packer can't pack the items).

Could someone provide a detailed breakdown of the process to custom-sort the boxes in a BoxList and apply it opt the Packer so it is applied to the algorithm?

[MarkBFamFour]

I looked further into this and I can see that BoxList has a getIterator() function that sorts the BoxList using the custom BoxSorter then returns a ArrayIterator Traversable object of the list. I can't see anywhere this is used, however, and gettingthe output produces the wrong type of object for the $packer->setBoxes() method.

I have sorted the items myself manually for now, but this seems like it's not fully implemented, or am I missing something important?