# File lib/websocket/frame/handler/handler75.rb, line 13
        def encode_frame
          case @frame.type
          when :close then "\xff\x00"
          when :text then
            ary = ["\x00", @frame.data, "\xff"]
            ary.map { |s| s.encode('UTF-8', 'UTF-8', invalid: :replace) }
            ary.join
          else raise WebSocket::Error::Frame::UnknownFrameType
          end
        end