code: def test_bool(self):
      sd = splits.SplitDict([])
      self.assertFalse(sd)  # Empty split is False
      si = [
          tfds.core.SplitInfo(
              name="train",
              shard_lengths=[5],
              num_bytes=0,
              filename_template=_filename_template("train"),
          )
      ]
      sd = splits.SplitDict(si)
      self.assertTrue(sd)
  
imports: from tensorflow_datasets import testing
  from tensorflow_datasets.core import naming
  from tensorflow_datasets.core import proto
  from tensorflow_datasets.core import splits
  from tensorflow_datasets.core.utils import shard_utils
  import tensorflow_datasets.public_api
label_desc: Use image node_id 5 for calling the SplitDictTest obj's underlying member method code with example usage: obj.test_bool() without return types