code: def dataset_splits(self):
      return [
          {
              "split": problem_lib.DatasetSplit.TRAIN,
              "shards": 1,
          },
          {
              "split": problem_lib.DatasetSplit.EVAL,
              "shards": 1,
          },
      ]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 3 for calling the Test1 obj's underlying member method code with example usage: obj.dataset_splits() and returns: list