title: pdfbox getAcroForm return null, while page - annots have field value
body: <p>In particular pdf file, while trying to fetch getAcroForm, it gives null.</p>
  <p>With the pdfbox jar debug options</p>
  <ul>
  <li>pages have annots and proper values inside the kid(0)</li>
  <li>at Root, field are missing, so getAcroForm gives null</li>
  </ul>
  <p>Is there any way to fetch field / annots value bind with page, and not bind with root document.</p>
  <p><a href="https://i.stack.imgur.com/Tl8aj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Tl8aj.png" alt="enter image description here" /></a></p>