@Override public void onRegistered() { List<RecipeBook> books = RecipeBooks.getInstance().getBooksPartialMatch(getBookID()); if (books.isEmpty()) { ErrorReporter.getInstance() .warning( "Flag " + getFlagType() + " could not find book ID containing '" + bookID + "', flag ignored."); remove(); return; } RecipeBook book = books.get(0); if (books.size() > 1) { ErrorReporter.getInstance() .warning( "Flag " + getFlagType() + " found " + books.size() + " books matching ID '" + bookID + "', using first: " + book.getTitle()); } }