code: def testRealEmpty(self):
      self.realTest(3, 0)
      self.realTest(0, 0)
      self.realTest(0, 3)
  
file_path: essentia/test/src/unittests/standard/test_multiplexer_streaming.py
imports: from essentia_test import *
  from essentia.streaming import Multiplexer
label_desc: Use image node_id 5 for calling the TestMultiplexer_Streaming obj's underlying member method code with example usage: obj.testRealEmpty() without return types