utv_unstack_tangent_stack
=========================

.. py:function:: t3toolbox.backend.utv_operations.utv_unstack_tangent_stack(frame_data, variations_data)

   .. code-block:: python

      def utv_unstack_tangent_stack(
              frame_data,       # frame .data,      supercore stack = C
              variations_data,  # variations .data, supercore stack = K + C
      ):  # -> array-like tree (shape K) of variations .data tuples (each stack = C)


   Peel the tangent stack ``K`` off the variations, returning a ``K``-shaped tree of variation-``.data``.

   The frame is shared across ``K``, so the frame is untouched (the caller pairs the same frame with every
   leaf). Inverse of :py:func:`utv_stack_tangent_stack`.