= <span class="default-value">-1</span></span> ])
      
    </section>
    <section class="desc markdown">
      <p>Synchronously unlocks the file or part of the file.</p>
<p>Unlocks the byte range from <code>start</code> to <code>end</code> of the file, with
the byte at position <code>end</code> not included. If no arguments are
specified, the full file is unlocked, If only <code>start</code> is
specified the file is unlocked from byte position <code>start</code> to the
end of the file.</p>
<p><em>NOTE</e