code: def test_not_scaled_multi_band(image_array_2bands):
      """Test if the user turns off scaling for multi bands the data vals
      remain intact.
      """
  
      im = image_array_2bands
      ax = ep.plot_bands(im)
  
      # Get all arrays to be plotted
      all_arrs = [
          a.get_images()[0].get_array() for a in ax if a.get_images()
      ]
      all_arrs_flat = np.concatenate(all_arrs, axis=0)
  
      # Return arr is unscaled for plotting
      assert (
          all_arrs_flat.min() == im.min()
          and all_arrs_flat.max() == im.max()
      )
      plt.close()
  
imports: import pytest
  import matplotlib.pyplot
  import matplotlib.colors
  import earthpy.plot
  import numpy
label_desc: Use image node_id 12 for calling a global function with example usage: test_not_scaled_multi_band(image_array_2bands) without return types