def __init__(self, consuming_instruction,<EOL>index_in_consuming_instruction):
self.__consuming_instruction_and_index = (<EOL>consuming_instruction,<EOL>index_in_consuming_instruction<EOL>)<EOL>self._produced_part = None<EOL>
:param consuming_instruction: the
  :class:`instruction <knittingpattern.Instruction.InstructionInRow>`
  that consumes the mesh
:param int index_in_consuming_instruction: the index of the mesh
  in the list of meshes that :attr:`consuming_instruction`
  consumes

.. note:: There should be no necessity to create instances of this
  directly. You should be able to use
  ``instruction.produced_meshes`` or ``instruction.consumed_meshes``
  to access the :class:`meshes <knittingpattern.Mesh.Mesh>`.