def get_object_pk(self, obj):
        return obj['pk']
Sets the last base volume based on how this object was called/created.  If the files have
dataset/ETHPy150Open pivotal-energy-solutions/django-datatable-view/datatableview/datatables.py/ValuesDatatable.get_object_pk--crossover with--dataset/ETHPy150Open Mouse-Imaging-Centre/pydpiper/atoms_and_modules/LSQ6.py/NonUniformityCorrection.finalize