code: public static @NotNull String getTagWithComments(@NotNull String placeholder) {
      return "\n<!-- " + getPlaceholderName(placeholder) + " START -->\n"
          + placeholder
          + "\n<!-- " + getPlaceholderName(placeholder) + " END -->\n";
    }
docs: Placeholder with HTML BEGIN and END comments
  @param placeholder Placeholder
  @return Tag with comments