code: public boolean saveFavorite(boolean favorite) {
  		if (PkRSS.getInstance() == null) return false;
  
  		return PkRSS.getInstance().saveFavorite(this, favorite);
  	}
docs: Adds this article into the favorites database.
  @param favorite Whether to add it or remove it.
  @return {@code true} if successful, {@code false} if otherwise.