code: def _create_embedding_file(self):
      return self.create_tempfile("embeddings.tfr").full_path
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import cmath
  from absl.testing import absltest
  from neural_structured_learning.tools import build_graph
  from neural_structured_learning.tools import graph_utils
  import six
  import tensorflow
  from google.protobuf import text_format
label_desc: Use image node_id 1 for calling the BuildGraphTest obj's underlying member method code with example usage: obj._create_embedding_file() and returns: self