docs: def align(self, cutout, reading, source):
          """
          Set the display center to the reference point.
  
          @param cutout:  The cutout to align on
          @type cutout: SourceCutout
          @param reading:  The reading this cutout is from
          @type reading: SourceReading
          @param source: The source the reading is from
          @type source: Source
          @return:
          """
          if not self.current_displayable:
              return
          if not self.current_displayable.aligned:
              focus_sky_coord = reading.reference_sky_coord
              #focus_calculator = SingletFocusCalculator(source)
              #logger.debug("Got focus calculator {} for source {}".format(focus_calculator, source))
              #focus = cutout.flip_flip(focus_calculator.calculate_focus(reading))
              #focus = cutout.get_pixel_coordinates(focus)
              #focus = cutout.pix2world(focus[0], focus[1], usepv=False)
              #focus_sky_coord = SkyCoord(focus[0], focus[1])
              self.current_displayable.pan_to(focus_sky_coord)