 <span class="returntype">void</span>
                    <span class="name ">first=</span>
<span class="signature">(<wbr><span class="parameter" id="first=-param-value"><span class="type-annotation"><a href="../../dart-math/Rectangle-class.html">Rectangle</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="../../dart-core/num-class.html">num</a></span>&gt;</span></span> <span class="parameter-name">value</span></span><wbr>)</span>
                  <div class="features">inherited</div