docstr: Check that Identity nodes used as control inputs are not removed.
docstr_tok: ["Check","that","Identity","nodes","used","as","control","inputs","are","not","removed","."]
code: def testRemoveIdentityUsedAsControlInputInConst(self):
      """Check that Identity nodes used as control inputs are not removed."""
      graph_def = graph_pb2.GraphDef()
      graph_def.node.extend(
          [
              self.create_constant_node_def(
                  "C", 1, dtypes.float32, inputs=["^I"]
              ),
              self.create_node_def("Identity", "I", ["Base"]),
              self.create_node_def("BaseOp", "Base", []),
          ]
      )
  
      self.assertProtoEquals(
          graph_def, graph_util.remove_training_nodes(graph_def)
      )
  
imports: from tensorflow.core.framework import attr_value_pb2
  from tensorflow.core.framework import function_pb2
  from tensorflow.core.framework import graph_pb2
  from tensorflow.core.framework import node_def_pb2
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import function
  from tensorflow.python.framework import graph_util
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import gen_state_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 14 for calling the GraphUtilTest obj's underlying member method code with example usage: obj.testRemoveIdentityUsedAsControlInputInConst() without return types