docs: public static void setPreferredStringRepresentation(GeodesicPositionStringRepresentation representation,
  			boolean useSymbolicDirection) {
  		final Preferences prefs = Preferences.userNodeForPackage(GeodesicPosition.class);
  		if (prefs != null) {
  			if (representation == null) {
  				prefs.remove("STRING_REPRESENTATION"); //$NON-NLS-1$
  				prefs.remove("SYMBOL_IN_STRING_REPRESENTATION"); //$NON-NLS-1$
  			} else {
  				prefs.put("STRING_REPRESENTATION", representation.toString()); //$NON-NLS-1$
  				prefs.putBoolean("SYMBOL_IN_STRING_REPRESENTATION", useSymbolicDirection); //$NON-NLS-1$
  			}
  		}
  	}