deleting variations referenced by group items causes problems

And if you comment that out, the next error in viewing the edit group is:
Error: Call to a member function getPrice() on null in Drupal\commerce_vado\Form\VadoGroupItemInlineForm::getPrice() (line 78 of /var/www/html/web/modules/contrib/commerce_vado/src/Form/VadoGroupItemInlineForm.php)

Still some behavior to sort out, but here is a start.

This works. A couple of things to do:

1. Add a warning message to the variation delete form notifying the user if group items will be deleted.
2. Decide what to do if the deleted group item results in an empty group. It seems best to not delete the group, and make sure an empty group won't cause crashes, seeing that group items are required on a group.

Does this only work BEFORE you delete? I added this patch in and I am still getting the error when I try to delete a group that was associated with a deleted variation.