code: def test_plot_corr_grid(close_figures):
      hie_data = randhie.load_pandas()
      corr_matrix = np.corrcoef(hie_data.data.values.T)
  
      plot_corr_grid([corr_matrix] * 2, xnames=hie_data.names)
  
      plot_corr_grid(
          [corr_matrix] * 5, xnames=[], ynames=hie_data.names
      )
  
      plot_corr_grid(
          [corr_matrix] * 3, normcolor=True, titles="", cmap="jet"
      )
  
imports: import numpy
  import pytest
  from statsmodels.datasets import randhie
  from statsmodels.graphics.correlation import plot_corr, plot_corr_grid
label_desc: Use image node_id 2 for calling a global function with example usage: test_plot_corr_grid(close_figures) without return types