Sweeper for few models

For example - i have a sweeper for one model(in this case About). class AboutSweeper < ActionController::Caching::Sweeper   observe About   def after_create(data)     expire_about(data)   end   def after_save(data)     expire_about(data)   end   def after_destroy(data)     expire_about(data)   end   def expire_about(data)     FileUtils.rm_rf File.expand_path("public/about/#{data.id}", RAILS_ROOT)     FileUtils.rm_rf File.expand_path("public/index.html", RAILS_ROOT)   end end

But I want to use one sweeper for several models. Can I write something like observer About, Book, Shop, City...... And expire this pages when i need? Or I need to create personal sweeper for model?

Thanks