title: Path to temporary Wicked PDF file in Rails 5
body: <p>I am creating a PDF file using Wicked:</p>
  
  <pre><code>pdf = WickedPdf.new.pdf_from_string('&lt;h1&gt;Hello There!&lt;/h1&gt;')
  </code></pre>
  
  <p>I assume that this creates a temporary file somewhere. How can I get the path to this temp file?</p>