code: private FacebookSettings fetchSettings() {
          SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(mContext);
          if (!preferences.getBoolean(mContext.getString(R.string.wings_facebook__link_key), false)) {
              return null;
          }
  
          int destinationId = preferences.getInt(mContext.getString(R.string.wings_facebook__destination_id_key), DestinationId.UNLINKED);
          String accountName = preferences.getString(mContext.getString(R.string.wings_facebook__account_name_key), null);
          String albumName = preferences.getString(mContext.getString(R.string.wings_facebook__album_name_key), null);
          String albumGraphPath = preferences.getString(mContext.getString(R.string.wings_facebook__album_graph_path_key), null);
          String pageAccessToken = preferences.getString(mContext.getString(R.string.wings_facebook__page_access_token_key), null);
          String photoPrivacy = preferences.getString(mContext.getString(R.string.wings_facebook__photo_privacy_key), null);
  
          return FacebookSettings.newInstance(destinationId, accountName, albumName, albumGraphPath, pageAccessToken, photoPrivacy);
      }
docs: Fetches the link settings from persisted storage.
  
  @return the {@link com.groundupworks.wings.facebook.FacebookSettings}; or null if unlinked.