code: def _model_settings(self):
      return {
          "desired_samples": 160,
          "fingerprint_size": 40,
          "label_count": 4,
          "window_size_samples": 100,
          "window_stride_samples": 100,
          "fingerprint_width": 40,
          "preprocess": "mfcc",
      }
  
imports: import os
  import numpy
  import tensorflow
  from tensorflow.examples.speech_commands import input_data
  from tensorflow.examples.speech_commands import models
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 4 for calling the InputDataTest obj's underlying member method code with example usage: obj._model_settings() and returns: dict