code: def _check_is_subset(self, a: list, b: list) -> bool:
      return set(a).issubset(set(b))
  
file_path: pipelinedp/tests/sampling_utils_test.py
imports: from absl.testing import absltest
  from absl.testing import parameterized
  import pipeline_dp.sampling_utils
label_desc: Use image node_id 1 for calling the SamplingUtilsTest obj's underlying member method code with example usage: obj._check_is_subset(a, b) and returns: set