code: def _get_index(indices, shape):  # type: ignore
      ind = 0
      mul = 1
      for pos, sh in zip(reversed(indices), reversed(shape)):
          ind += pos * mul
          mul *= sh
      return ind
  
label_desc: Use image node_id 3 for calling a global function with example usage: _get_index(indices, shape) and returns: ind