code: def testPreferredSize(self):
      # NB: this is not as useful as before when we had a preferredSize parameter
      input = [float(i) for i in range(44100)]
      result = self.accumulate(input, size=1024)
      self.assertEqualVector(result, input)
  
file_path: essentia/test/src/unittests/standard/test_realaccumulator_streaming.py
imports: from essentia_test import *
  from essentia.streaming import RealAccumulator
label_desc: Use image node_id 5 for calling the TestRealAccumulator_Streaming obj's underlying member method code with example usage: obj.testPreferredSize() without return types