# File lib/active_support/multibyte/chars.rb, line 95
      def method_missing(method, *args, &block)
        if method.to_s =~ /!$/
          @wrapped_string.__send__(method, *args, &block)
          self
        else
          result = @wrapped_string.__send__(method, *args, &block)
          result.kind_of?(String) ? chars(result) : result
        end
      end