@Nullable
  private static PsiClass getRepeatableContainer(@NotNull PsiAnnotation annotation) {
    PsiAnnotationMemberValue containerRef = PsiImplUtil.findAttributeValue(annotation, null);
    if (!(containerRef instanceof PsiClassObjectAccessExpression)) return null;
    PsiType containerType = ((PsiClassObjectAccessExpression)containerRef).getOperand().getType();
    if (!(containerType instanceof PsiClassType)) return null;
    return ((PsiClassType)containerType).resolve();
  }
@Nullable
  private static PsiClass getRepeatableContainer(@NotNull PsiAnnotation annotation)