code: def load(self, filename, downmix, sampleRate):
      return MonoLoader(
          filename=filename, downmix=downmix, sampleRate=sampleRate
      )()
  
imports: from essentia_test import *
  from numpy import fabs
label_desc: Use image node_id 2 for calling the TestMonoLoader obj's underlying member method code with example usage: obj.load(filename, downmix, sampleRate) and returns: MonoLoader