ription of a tangent: the angle at a point. <a href="dart-ui/Tangent-class.html">[...]</a>
        </dd>
        <dt id="TextBox">
          <span class="name "><a href="dart-ui/TextBox-class.html">TextBox</a></span>         
        </dt>
        <dd>
          A rectangle enclosing a run of text. <a href="dart-ui/TextBox-class.html">[...]</a>
        </dd>
        <dt id="TextDecoration">
          <span class="name "><a href="dart-ui/TextDecoration-class.html">TextDecoration</a></span>         
        <