private static String getSimpleClassName(@NotNull PsiClass psiClass) {
    final StringBuilder psiClassName = new StringBuilder();

    PsiClass containingClass = psiClass;
    do {
      if (!psiClassName.isEmpty()) {
        psiClassName.insert(0, '.');
      }
      psiClassName.insert(0, containingClass.getName());
      containingClass = containingClass.getContainingClass();
    }
    while (null != containingClass);

    return psiClassName.toString();
  }
private static String getSimpleClassName(@NotNull PsiClass psiClass)