@NotNull
  private static String calculateTooltip(@NotNull String key, @NlsSafe String interfaceClassName) {
    return new HtmlBuilder().append(JavaAnalysisBundle.message(key)).append(" ")
      .appendLink("#javaClass/" + interfaceClassName, interfaceClassName)
      .br().append(HtmlChunk.text(JavaAnalysisBundle.message("service.click.to.navigate"))
                     .wrapWith(HtmlChunk.font(2))
                     .wrapWith(HtmlChunk.div("margin-top: 5px"))).toString();
  }
@NotNull
  private static String calculateTooltip(@NotNull String key, @NlsSafe String interfaceClassName)