new independent <a href="dart-io/IOSink-class.html">IOSink</a> for the file. The
<a href="dart-io/IOSink-class.html">IOSink</a> must be closed when no longer used, to free
system resources. <a href="dart-io/File/openWrite.html">[...]</a>
                  
</dd>
        <dt id="readAsBytes" class="callable">
          <span class="name"><a href="dart-io/File/readAsBytes.html">readAsBytes</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-async/Futu