code: private void handleShowRestoreDefaultsButtonArgument(@NonNull final Bundle arguments) {
          boolean showButton = arguments.getBoolean(EXTRA_SHOW_RESTORE_DEFAULTS_BUTTON, false);
          showRestoreDefaultsButton(showButton);
      }
docs: Handles the extra of the arguments, which have been passed to the fragment, that allows to
  show the button, which allows to restore the preferences' default values.
  
  @param arguments
  The arguments, which have been passed to the fragment, as an instance of the class
  {@link Bundle}. The arguments may not be null