class_docstr: Unit tests for datasets.py.
docstr: Test the a given dataset is available.
docstr_tok: ["Test","the","a","given","dataset","is","available","."]
code: def test_available(self, name):
      """Test the a given dataset is available."""
      self.assertIsNotNone(datasets.get_dataset(name))
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from scenic.dataset_lib import datasets
  from scenic.projects.baselines.detr import input_pipeline_detection
label_desc: Use image node_id 1 for calling the DatasetsTest obj's underlying member method code with example usage: obj.test_available(name) without return types