class_docstr: Unit tests for the nearest neighbors builder class.
code: def test_make_updatable(self):
      builder = self.create_builder()
      self.assertIsNotNone(builder)
  
      self.assertTrue(builder.spec.isUpdatable)
      builder.is_updatable = False
      self.assertFalse(builder.spec.isUpdatable)
      builder.is_updatable = True
      self.assertTrue(builder.spec.isUpdatable)
  
imports: import os
  import shutil
  import unittest
  from coremltools._deps import _HAS_SKLEARN
  from coremltools.models import MLModel
  from coremltools.models.nearest_neighbors import KNearestNeighborsClassifierBuilder
  from coremltools.models.utils import _is_macos
label_desc: Use image node_id 6 for calling the NearestNeighborsBuilderTest obj's underlying member method code with example usage: obj.test_make_updatable() without return types