code: def testRealEmpty(self):
      (inputs, expected) = self.computeRealInput(2, 0)
      mux = Multiplexer(numberRealInputs=2)
      result = mux(inputs[0], inputs[1])
      self.assertEqualVector(result, expected)
  
file_path: essentia/test/src/unittests/standard/test_multiplexer.py
imports: from essentia_test import *
label_desc: Use image node_id 5 for calling the TestMultiplexer obj's underlying member method code with example usage: obj.testRealEmpty() without return types