@Nullable
  @Override
  protected String validateQualifiedName(String packageName, @NotNull String extractedSuperName) {
    if (StringUtil.getQualifiedName(packageName, extractedSuperName).equals(mySourceClass.getQualifiedName())) {
      return JavaRefactoringBundle.message("different.name.expected");
    }
    return null;
  }
@Nullable
  @Override
  protected String validateQualifiedName(String packageName, @NotNull String extractedSuperName)