code: def testDocString(self):
      def f(x, do_add):
          v = variables.Variable(5.0)
          if do_add:
              op = v.assign_add(x)
          else:
              op = v.assign_sub(x)
          with ops.control_dependencies([op]):
              return v.read_value()
  
      f_add = wrap_function.wrap_function(
          f, [tensor_spec.TensorSpec((), dtypes.float32), True]
      )
  
      self.assertAllEqual(f_add(1.0), 6.0)
      self.assertAllEqual(f_add(1.0), 7.0)
  
      # Can call tf.compat.v1.wrap_function again to get a new trace, a new set
      # of variables, and possibly different non-template arguments.
      f_sub = wrap_function.wrap_function(
          f, [tensor_spec.TensorSpec((), dtypes.float32), False]
      )
  
      self.assertAllEqual(f_sub(1.0), 4.0)
      self.assertAllEqual(f_sub(1.0), 3.0)
  
imports: import os
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.eager import backprop
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import wrap_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import importer
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import state_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import test
  from tensorflow.python.training import saver
label_desc: Use image node_id 1 for calling the WrapFunctionTest obj's underlying member method code with example usage: obj.testDocString() and returns: v