code: def test_import_should_okay(self):
      try:
          from bigdl.nano.automl.hpo.visualization import (
              plot_optimization_history,
          )
      except ImportError:
          self.fail(
              "cannot import plot_optimization_history from nano.aotoml.hpo.visualization."
          )
      try:
          from bigdl.nano.automl.hpo.visualization import (
              plot_parallel_coordinate,
          )
      except ImportError:
          self.fail(
              "cannot import plot_parallel_coordinate from nano.aotoml.hpo.visualization."
          )
      try:
          from bigdl.nano.automl.hpo.visualization import (
              plot_intermediate_values,
          )
      except ImportError:
          self.fail(
              "cannot import plot_intermediate_values from nano.aotoml.hpo.visualization."
          )
      try:
          from bigdl.nano.automl.hpo.visualization import plot_contour
      except ImportError:
          self.fail(
              "cannot import plot_contour from nano.aotoml.hpo.visualization."
          )
      try:
          from bigdl.nano.automl.hpo.visualization import (
              plot_param_importances,
          )
      except ImportError:
          self.fail(
              "cannot import plot_param_importances from nano.aotoml.hpo.visualization."
          )
  
imports: import pytest
  from unittest import TestCase
  import bigdl.nano.automl
label_desc: Use image node_id 1 for calling the TestVisualization obj's underlying member method code with example usage: obj.test_import_should_okay() without return types