code: def dense_str():
      return constant_op.constant(
          [
              ["3", "1", "4", "1"],
              ["", "", "", ""],
              ["5", "9", "2", ""],
              ["6", "", "", ""],
              ["", "", "", ""],
              ["3", "1", "4", "1"],
              ["3", "1", "", ""],
              ["2", "1", "4", "1"],
          ]
      )
  
imports: from absl.testing import parameterized
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import multi_device_iterator_ops
  from tensorflow.python.distribute import mirrored_strategy
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import map_fn
  from tensorflow.python.ops.math_ops import reduce_sum
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.string_ops import string_to_hash_bucket
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling a global function with example usage: dense_str() and returns: constant_op