code: def _build_graph(self, num_pipelines, num_outputs):
      init_ops = []
      get_next_ops = []
      for i in range(num_pipelines):
          name = "input_pipeline_%d" % i
          init_op, get_next_op = self._build_input_pipeline(
              name, num_outputs
          )
          init_ops.append(init_op)
          get_next_ops.append(get_next_op)
      saver = saver_lib.Saver()
      return init_ops, get_next_ops, saver
  
file_path: tensorflow-upstream/tensorflow/python/data/experimental/kernel_tests/make_saveable_from_iterator_test.py
imports: import os
  from absl.testing import parameterized
  from tensorflow.python.data.experimental.ops import iterator_ops
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.platform import test
  from tensorflow.python.training import saver
label_desc: Use image node_id 2 for calling the MakeSaveableFromIteratorTest obj's underlying member method code with example usage: obj._build_graph(num_pipelines, num_outputs) and returns: init_ops,  get_next_ops,  saver