PHP files and XML files to edit

- OrderShipment grid:

code/Frans/CustomOrderGridExport/Rewrite/Framework/View/Element/UiComponent/DataProvider/FilterPool.php
code/Frans/OrderProcessing/Model/ResourceModel/Shipment/Grid/CollectionShipment.php
code/Frans/OrderProcessing/view/adminhtml/ui_component/sales_order_shipment_grid.xml
Custom columns, such as code/Frans/OrderProcessing/Ui/Component/Listing/Column/Shipment/InvoiceNumber.php