code: def dgl_mp_batchify_fn(data):
      if isinstance(data[0], tuple):
          data = zip(*data)
          return [dgl_mp_batchify_fn(i) for i in data]
  
      for dt in data:
          if dt is not None:
              if isinstance(dt, dgl.DGLGraph):
                  return [
                      d for d in data if isinstance(d, dgl.DGLGraph)
                  ]
              elif isinstance(dt, nd.NDArray):
                  pad = Pad(axis=(1, 2), num_shards=1, ret_length=False)
                  data_list = [dt for dt in data if dt is not None]
                  return pad(data_list)
  
label_desc: Use image node_id 1 for calling a global function with example usage: dgl_mp_batchify_fn(data) and returns: unknown, unknown, pad