@Override
  public void appendDerivedClasses(@NotNull StringBuilder buf, @NotNull RefClass refClass) {
    String header = refClass.isInterface()
                    ? AnalysisBundle.message("inspection.export.results.extended.implemented")
                    : AnalysisBundle.message("inspection.export.results.extended");
    myComposer.appendSection(buf, header, refClass.getSubClasses());
  }
@Override
  public void appendDerivedClasses(@NotNull StringBuilder buf, @NotNull RefClass refClass)