code: private String getLines(SlotsLines lines) {
      StringBuilder builder = new StringBuilder();
      for (MiniCapability cap : lines.getLinesType()) {
        String icon = cap.getIcon();
        String version = cap.getVersion();
        builder.append("<p>");
        if (version != null) {
          builder.append("v:").append(version);
        }
        for (TestSlot s : lines.getLine(cap)) {
          builder.append(getSingleSlotHtml(s, icon));
        }
        builder.append("</p>");
      }
      return builder.toString();
    }
docs: the lines of icon representing the possible slots