@Cached#postCondition条件报错

`
@Cached(name = "jetCache:getListById:", key = "#id", expire = 60,
postCondition = "#result != null && #result.size() != 0")

public List getListById(Integer id) {
if (Objects.isNull(id)) {
return Collections.emptyList();
}
return iXXInterface.getXXListById(id);
}
`
当返回 Collections.emptyList()时，报错 EmptyList不能转成 ArrayList

Start with the @Cached annotation's postCondition handling and reproduce the issue using getListById(Integer id), especially when it returns Collections.emptyList(). Done means the postCondition no longer causes an EmptyList-to-ArrayList conversion error for this return value.

Written by the indexing model from the issue text.