m-index"><span class="type-annotation"><a href="dart-core/int-class.html">int</a></span> <span class="parameter-name">index</span></span>)
            <span class="returntype parameter">&#8594; <a href="dart-typed_data/Float64x2-class.html">Float64x2</a></span>
          </span>
        </dt>
        <dd class="inherited">
          
          <div class="features">inherited</div>
</dd>
        <dt id="operator []=" class="callable inherited">
          <span class="name"><a href="dart-typed_data/Unmodifiab