docs: def spaceless_pdf_plot_maker(array, filename, vmax=None, dpi=DEFAULT_DPI):
      """Draw a pretty plot from an array
  
      A function that performs all the tedious matplotlib
      magic to draw a 2D array with as few parameters and
      as little whitespace as possible.
  
      Parameters
      ----------
      array : array_like
          The input array to draw.
      filename : file, str or pathlib.Path
          The output image to save the array into.
      vmax : float, optional
          The default saturation threshold for the array. If set to None, the
          80th percentile value of the array is chosen. Default is None.
      dpi : int, optional
          Dots per inch (DPI) of the output image. Default is 200.
      """
  
      if vmax is None:
          vmax = np.percentile(array, DEFAULT_SATURATION_THRESHOLD)
      plt.gca().set_axis_off()
      plt.subplots_adjust(top=1, bottom=0, right=1, left=0, hspace=0, wspace=0)
      plt.margins(0, 0)
      plt.gca().xaxis.set_major_locator(plt.NullLocator())
      plt.gca().yaxis.set_major_locator(plt.NullLocator())
      plt.figure()
      if SEABORN:
          sns.heatmap(array, vmax=vmax, cmap="Reds")
      else:
          plt.imshow(array, vmax=vmax, cmap="Reds", interpolation="none")
          plt.colorbar()
      plt.savefig(filename, bbox_inches="tight", pad_inches=0.0, dpi=dpi)
      plt.close()