
                  </dt>
        <dd>
          Mode for opening a file for writing <em>only</em>. The file is
overwritten if it already exists. The file is created if it does not
already exist.
                  
  <div>
            <span class="signature"><code>const FileMode._internal(3)</code></span>
          </div>
        </dd>
        <dt id="writeOnlyAppend" class="constant">
          <span class="name "><a href="dart-io/FileMode/writeOnlyAppend-constant.html">writeOnlyAppend</a></span>
          