pack_graphemes

# File activesupport/lib/active_support/multibyte/unicode.rb, line 48
      def pack_graphemes(unpacked)
        ActiveSupport::Deprecation.warn(          ActiveSupport::Multibyte::Unicode#pack_graphemes is deprecated and will be          removed from Rails 6.1. Use array.flatten.pack("U*") instead..squish)

        unpacked.flatten.pack("U*")
      end