docs: def widths_in_range_mm(
              self,
              minwidth=EMIR_MINIMUM_SLITLET_WIDTH_MM,
              maxwidth=EMIR_MAXIMUM_SLITLET_WIDTH_MM
      ):
          """Return list of slitlets which width is within given range
  
          Parameters
          ----------
          minwidth : float
              Minimum slit width (mm).
          maxwidth : float
              Maximum slit width (mm).
  
          Returns
          -------
          list_ok : list
              List of booleans indicating whether the corresponding
              slitlet width is within range
  
          """
  
          list_ok = []
          for i in range(EMIR_NBARS):
              slitlet_ok = minwidth <= self._csu_bar_slit_width[i] <= maxwidth
              if slitlet_ok:
                  list_ok.append(i + 1)
  
          return list_ok