code: def testOnLevelAnalyzer(self):
      from timeside.core import get_processor
      from timeside.core.tools.test_samples import samples
  
      wav_file = samples["C4_scale.wav"]
      decoder = get_processor("file_decoder")(uri=wav_file)
      analyzer = get_processor("level")()
      pipe = decoder | analyzer
      pipe.run()
      self.result = analyzer.results
  
imports: import unittest
  from unit_timeside import TestRunner
  from timeside.core.analyzer import AnalyzerResult, AnalyzerResultContainer
  from timeside.core import __version__
  import numpy
  from math import pi
  from timeside.core.analyzer import numpy_data_types
label_desc: Use image node_id 1 for calling the LevelAnalyzer obj's underlying member method code with example usage: obj.testOnLevelAnalyzer() without return types