title: How to detect which signature field is linked to the corresponding btn at run time?
body: <p>I'd a document <a href="https://drive.google.com/file/d/1gws1sO6qIIOqlCe1BXqQcCR3okQWFQ0c/view?usp=sharing" rel="nofollow noreferrer">document.pdf</a> which has some signature fields and their corresponding btn visible on the document. Using <code>iText7</code>, while iterating over the fields I can see both the sign btns and signature fields. How I can detect that which signature field is linked to corresponding sign btn at run time?</p>