code: public static void appendPrettyHexDump(
          final StringBuilder dump, final DirectBuffer buffer, final int offset, final int length)
      {
          HexUtil.appendPrettyHexDump(dump, buffer, offset, length);
      }
docs: Appends the prettified multi-line hexadecimal dump of the specified {@link DirectBuffer} to the specified
  {@link StringBuilder} that is easy to read by humans, starting at the given {@code offset} using
  the given {@code length}.
  
  @param dump   where should we append string representation of the buffer
  @param buffer dumped buffer
  @param offset where should we start to print
  @param length how much should we print