code: def testInsertLookupGrad(self):
      with backprop.GradientTape() as tape:
          m = map_ops.empty_tensor_map()
          k = constant_op.constant(1.0)
          v = constant_op.constant(11.0)
          tape.watch(v)
          m = map_ops.tensor_map_insert(m, k, v)
          l = map_ops.tensor_map_lookup(m, k, dtypes.float32)
          l *= 5
          g = tape.gradient(l, v)
          self.assertAllEqual(g, 5)
  
imports: from absl.testing import parameterized
  from tensorflow.python.eager import backprop
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import map_ops
  from tensorflow.python.ops import sort_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 15 for calling the MapOpsTest obj's underlying member method code with example usage: obj.testInsertLookupGrad() without return types