xprepend
========

.. py:function:: t3toolbox.backend.common.xprepend(x, S)

   .. code-block:: python

      def xprepend(
              x,                                     # slice (if S is an array) or element (if S is a sequence)
              S: typ.Union[NDArray, typ.Sequence],   # array or sequence to prepend to
      ) -> typ.Union[NDArray, typ.Tuple]:            # S with x prepended


   Prepend slice to array or element to sequence