Figuring out if a field is signed

How can I programmatically determine if a field is signed?

There are interfaces to determine if a document is signed–but as far as I can tell, no indication which fields are related to that signing. There is also the Java method Item.isSigned()–which you would think would be what I’m looking for. Except the API and tests indicate that it doesn’t indicate if it is currently signed–“true if the item is signed when the document is NEXT signed”.

Any ideas? I’m open to using any API that would allow me to be able to determine this.