code: def graph(self):
      if self._graph is None:
          self._graph = tf.Graph()
      return self._graph
  
file_path: tf-encrypted/primitives/tf_encrypted/test/execution_context.py
imports: import contextlib
  import tensorflow
label_desc: Use image node_id 2 for calling the GraphExecutionContext obj's underlying member method code with example usage: obj.graph() and returns: self