code: def build_graph_helper():
      g = ops.Graph()
      with g.as_default():
          x = variable_v1.VariableV1(5, name="x")
          y = variable_v1.VariableV1(11, name="y")
          z = x + y
  
          foo_sig_def = signature_def_utils.build_signature_def(
              {"foo_input": utils.build_tensor_info(x)},
              {"foo_output": utils.build_tensor_info(z)},
          )
          bar_sig_def = signature_def_utils.build_signature_def(
              {
                  "bar_x": utils.build_tensor_info(x),
                  "bar_y": utils.build_tensor_info(y),
              },
              {"bar_z": utils.build_tensor_info(z)},
          )
      return g, {"foo": foo_sig_def, "bar": bar_sig_def}, y
  
imports: import os
  import shutil
  from absl.testing import parameterized
  from tensorflow.python.client import session
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import resource_variables_toggle
  from tensorflow.python.ops import state_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.saved_model import builder
  from tensorflow.python.saved_model import loader_impl
  from tensorflow.python.saved_model import signature_def_utils
  from tensorflow.python.saved_model import utils
  from tensorflow.python.training import saver
label_desc: Use image node_id 3 for calling a global function with example usage: build_graph_helper() and returns: g,  dict,  y