code: public EmbedBuilder setFooter(String text, InputStream icon) {
          delegate.setFooter(text, icon);
          return this;
      }
docs: Sets the footer of the embed.
  This method assumes the file type is "png"!
  
  @param text The text of the footer.
  @param icon The footer's icon.
  @return The current instance in order to chain call methods.