code: def test_empty_split(self):
      sd = splits.SplitDict([])
      with self.assertRaisesWithPredicateMatch(
          KeyError, "`splits` is empty"
      ):
          _ = sd["train"]
  
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 7 for calling the SplitDictTest obj's underlying member method code with example usage: obj.test_empty_split() without return types