code: private static byte[] processBulkReply(final RedisInputStream is) {
          int len = Integer.parseInt(is.readLine());
          log.trace("[RedisProtocol] Reply bulk-reply. ${}", len);
          if (len == -1) {
              return null;
          }
          byte[] read = new byte[len];
          int offset = 0;
          while (offset < len) {
              offset += is.read(read, offset, (len - offset));
          }
          // read 2 more bytes for the command delimiter
          is.readByte();
          is.readByte();
  
          return read;
      }
docs: Process bulk reply.
  
  @param is the is
  @return the byte[]