code: def __init__(self, layer_name):
      super(LayerSelector, self).__init__()
      self.layer_name = layer_name
  
imports: import os
  import shutil
  import tempfile
  import unittest
  import numpy
  import coremltools.models.datatypes
  from coremltools.models import MLModel
  from coremltools.models.neural_network import AdamParams, NeuralNetworkBuilder, SgdParams, quantization_utils
  from coremltools.models.pipeline import PipelineClassifier, PipelineRegressor
  from coremltools.models.utils import save_spec
label_desc: Use image node_id 1 to create a new LayerSelector object from inherited base classes: quantization_utils with example: obj = LayerSelector(layer_name)