# File lib/thor/actions/file_manipulation.rb, line 172
    def inject_into_class(path, klass, *args, &block)
      config = args.last.is_a?(Hash) ? args.pop : {}
      config.merge!(:after => /class #{klass}\n|class #{klass} .*\n/)
      inject_into_file(path, *(args << config), &block)
    end