code: def testRaggedMapWithIncorrectFnOutputSignature(self):
      x = ragged_factory_ops.constant([[1, 2, 3, 4], [1]])
      with self.assertRaisesRegex(
          errors.InvalidArgumentError,
          "All flat_values must have compatible shapes",
      ):
          y = map_fn_lib.map_fn(
              lambda r: map_fn_lib.map_fn(lambda y: r, r), x
          )
          self.evaluate(y)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import map_fn
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import string_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_functional_ops
  from tensorflow.python.ops.ragged import ragged_map_ops
  from tensorflow.python.ops.ragged import ragged_math_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 9 for calling the RaggedMapOpTest obj's underlying member method code with example usage: obj.testRaggedMapWithIncorrectFnOutputSignature() without return types