ts or extends.
Accessing a member which isn't implemented by the class
will cause the <code>noSuchMethod</code> method to be called normally,
the <code>@proxy</code> annotation merely states the intent to handle (some of) those
<code>noSuchMethod</code> calls gracefully.</p>
<p>A class that marked as <code>@proxy</code> should override the <code>noSuchMethod</code>
declared on <a href="dart-core/Object-class.html">Object</a>.</p>
<p>The intent of the <code>@proxy</code> notation is to create objects that im