def METHOD_NAME(multi,single):
  from matplotlib import pyplot as plt
  fig,ax = plt.subplots(1,3)
  scale = multi.max()
  im = ax[0].imshow(multi, vmin=-scale, vmax=scale); ax[0].set_title("All sources")
  ax[1].imshow(single, vmin=-scale, vmax=scale); ax[1].set_title("Single source")
  ax[2].imshow(multi-single, vmin=-scale, vmax=scale); ax[2].set_title("Difference")
  fig.subplots_adjust(right=0.88)
  cbar = fig.add_axes([0.90,0.2,0.04,0.6]) # left, bottom, width, height
  fig.colorbar(im, cax=cbar)
  plt.show()