defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.36/modules/angular2/src/forms/directives/ng_control_group.ts#L12-L74">angular2/src/forms/directives/ng_control_group.ts (line 12)</a>
This module is used for handling user input, by defining and building a <a href='ControlGroup-class.html'><code>ControlGroup</code></a> that
consists of
<a href='Control-class.html'><code>Control</code></a> objects, and mapping them onto the DOM. <a href='Control-class.html'><code>Control</code></a> objects can then be used