title: In Itext 7, how to get the range stream to sign a pdf?
body: <p>I'm trying to migrate my application from iText 5.5.9 to iText 7 and I have a problem with signing a document on the server using a signature created on the client (described in the Digital Signatures for PDF documents). </p>
  
  <p>As the <code>getRangeStream()</code> method isn't public anymore as it was in iText 5.5.9, how can I obtain a reference to the range stream?</p>