code: def testGraphDefsWithPermutedFunctionsCompareEqual(self):
      @function.Defun(dtypes.float32)
      def F1(x):
          return math_ops.exp(x) - math_ops.exp(-x)
  
      @function.Defun(dtypes.float32)
      def F2(x):
          return math_ops.exp(x)
  
      definition_1 = F1.definition
      definition_2 = F2.definition
      library = function_pb2.FunctionDefLibrary()
      library.function.extend([definition_1, definition_2])
  
      graph_def1 = graph_pb2.GraphDef()
      graph_def1.library.CopyFrom(library)
  
      reversed_library = function_pb2.FunctionDefLibrary()
      reversed_library.function.extend([definition_2, definition_1])
      graph_def2 = graph_pb2.GraphDef()
      graph_def2.library.CopyFrom(reversed_library)
  
      self.assertTrue(
          graph_util.graph_defs_equal(graph_def1, graph_def2)
      )
  
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 21 for calling the GraphUtilTest obj's underlying member method code with example usage: obj.testGraphDefsWithPermutedFunctionsCompareEqual() and returns: unknown, math_ops