code: public MessageBuilder appendCodeBlock(CharSequence text, CharSequence language)
      {
          builder.append("```").append(language).append('\n').append(text).append("\n```");
          return this;
      }
docs: Appends a code-block to the Message.
  <br>Discord uses <a href="https://highlightjs.org/">Highlight.js</a> for its language highlighting support. You can find out what
  specific languages are supported <a href="https://github.com/isagalaev/highlight.js/tree/master/src/languages">here</a>.
  
  @param  text
  the code to append
  @param  language
  the language of the code. If unknown use an empty string
  
  @return The MessageBuilder instance. Useful for chaining.