# File MIME/types.rb, line 908
        def Types.[](type_string)
            if type_string.class == Regexp
                matches = []
                @@type_list.each_key do |k|
                    matches << @@type_list[k] if k =~ type_string
                end
                matches.flatten!
            else
                mime = MIME::Type.simplified(type_string)
                @@type_list[mime]
            end
        end