code: def _test_plot_obj(self, target_or_model_type):
      for plot_obj in self.get_plot_objs(target_or_model_type):
          self.check_common(plot_obj, target_or_model_type)
  
imports: import pytest
  import numpy
  from pdpbox.info_plots import TargetPlot, PredictPlot, InteractTargetPlot, InteractPredictPlot
  from pdpbox.utils import FeatureInfo, _make_list
  from conftest import DummyModel, PlotTestBase
label_desc: Use image node_id 1 for calling the _TestInfoPlot obj's underlying member method code with example usage: obj._test_plot_obj(target_or_model_type) without return types