Is there a way to mark a display field as optional?

[unext-wendong]

For the getAll method, there are cases where not all of the items in the API response have the same set of fields available, e.g. items that are in different state would have different sets of fields.

From the README page, there doesn't seem to be a way to display these optional response fields. Please kindly let me know if I missed anything.

Thanks,