code: private void initializeWizardButtonBarElevation(final SharedPreferences sharedPreferences) {
          String key = getString(R.string.wizard_button_bar_elevation_preference_key);
          String defaultValue =
                  getString(R.string.wizard_button_bar_elevation_preference_default_value);
          int elevation = Integer.valueOf(sharedPreferences.getString(key, defaultValue));
          setButtonBarElevation(elevation);
      }
docs: Initializes the elevation of a wizard's button bar.
  
  @param sharedPreferences
  The shared preferences, which should be used, as an instance of the type {@link
  SharedPreferences}