code: def _export_to_tf_tensor(self, mtf_tensor):
      mesh_impl = mtf.placement_mesh_impl.PlacementMeshImpl(
          shape=[], layout={}, devices=[""]
      )
      lowering = mtf.Lowering(self.graph, {self.mesh: mesh_impl})
      return lowering, lowering.export_to_tf_tensor(mtf_tensor)
  
file_path: mesh/mesh_tensorflow/transformer/memory_layers_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import mesh_tensorflow
  from mesh_tensorflow.transformer import memory_layers
  import mock
  import numpy
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the FlatKeyValueMemoryTest obj's underlying member method code with example usage: obj._export_to_tf_tensor(mtf_tensor) and returns: lowering,  lowering