writeln-param-obj"><span class="type-annotation"><a href="dart-core/Object-class.html">Object</a></span> <span class="parameter-name">obj</span> = <span class="default-value">""</span></span> ])
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd class="inherited">
          Converts <code>obj</code> to a String by invoking <a href="dart-core/Object/toString.html">Object.toString</a> and
writes the result to <code>this</code>, followed by a newline.