@Nullable
  public static String getString(@Nullable PsiAnnotationMemberValue targetValue) {
    if (targetValue instanceof PsiLiteral) {
      final Object value = ((PsiLiteral)targetValue).getValue();
      if (value instanceof String) return (String)value;
    }
    return null;
  }
@Nullable
  public static String getString(@Nullable PsiAnnotationMemberValue targetValue)