ut3_full_sum
============

.. py:function:: t3toolbox.backend.ut3_sampling.ut3_full_sum(data)

   .. code-block:: python

      def ut3_full_sum(
              data: UT3Data,
      ) -> NDArray:  # shape=stack_shape (scalar if unstacked) -- sum over ALL physical modes


   Sum the represented dense tensor over all physical modes: ``apply`` with all-ones vectors (the
   masked supercore's padding is zero, so ones over ``N`` sum only the real ``Ni``).