code: def pl2nvp(plane):
      
      assert (isinstance(plane, stypes.Plane))
      normal = stypes.emptyDoubleVector(3)
      point = stypes.emptyDoubleVector(3)
      libspice.pl2nvp_c(ctypes.byref(plane), normal, point)
      return stypes.cVectorToPython(normal), stypes.cVectorToPython(point)
docs: Return a unit normal vector and point that define a specified plane.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/pl2nvp_c.html
  
  
      :param plane: A SPICE plane.
      :type plane: supporttypes.Plane
      :return: A unit normal vector and point that define plane.
      :rtype: tuple