code: def testShapeMismatchError1(self):
      dt = constant_op.constant([1, 2, 3, 4, 5, 6])
      segment_ids = ragged_factory_ops.constant([[1, 2], []])
      self.assertRaisesRegex(
          ValueError,
          "segment_ids.shape must be a prefix of data.shape, "
          "but segment_ids is ragged and data is not.",
          ragged_math_ops.segment_sum,
          dt,
          segment_ids,
          3,
      )
  
imports: import math
  from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops.ragged import ragged_factory_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 6 for calling the RaggedSegmentOpsTest obj's underlying member method code with example usage: obj.testShapeMismatchError1() without return types