private String decorateTypeText(final String shortClassName) {
    switch (myVariance) {
      case VARIANCE_NONE:
        return shortClassName;
      case VARIANCE_EXTENDS:
        return PsiWildcardType.EXTENDS_PREFIX + shortClassName;
      case VARIANCE_SUPER:
        return PsiWildcardType.SUPER_PREFIX + shortClassName;
      case VARIANCE_INVARIANT:
        return "?";
      default:
        assert false : myVariance;
        return null;
    }
  }
private String decorateTypeText(final String shortClassName)