@Nullable
  public static PsiAnnotation getAnnotation(PsiMember clazz, String annotName) {
    if (annotName == null) return null;
    final PsiModifierList list = clazz.getModifierList();
    if (list == null) return null;
    for (PsiAnnotation annotation : list.getAnnotations()) {
      if (annotName.equals(annotation.getQualifiedName())) return annotation;
    }
    return null;
  }
@Nullable
  public static PsiAnnotation getAnnotation(PsiMember clazz, String annotName)