code: def test_list_available_pipelines(self):
      available_pipelines = PassPipeline.list_available_pipelines()
      assert len(available_pipelines) == 12
      assert "default" in available_pipelines
      assert "default_palettization" in available_pipelines
  
file_path: coremltools/coremltools/converters/mil/mil/passes/tests/test_pass_pipeline.py
imports: import numpy
  import pytest
  from coremltools.converters.mil.mil import Builder
  from coremltools.converters.mil.mil.passes.pass_pipeline import PassPipeline, PassPipelineManager
  from coremltools.converters.mil.testing_utils import assert_model_is_valid, get_op_types_in_program
label_desc: Use image node_id 9 for calling the TestPassPipeline obj's underlying member method code with example usage: obj.test_list_available_pipelines() without return types