code: def test_create_trace_none(self):
      embeds = SharedEmbedding.from_array(self.x, self.weight_path)
      indexs = paddle.to_tensor([0, 2])
  
      trace = embeds.create_trace(indexs, None)
      self.assertIsNone(trace)
  
imports: import time
  import unittest
  import numpy
  import paddle
  from pgl.utils.shared_embedding import SharedEmbedding
label_desc: Use image node_id 11 for calling the TestSharedEmebdding obj's underlying member method code with example usage: obj.test_create_trace_none() without return types